Background: You may hear males "ribbiting," producing a mating call used to attract females to the bodies of water best for mating and breeding. Frog calls can occur during the day or night. Each frog species has a different call that is used to attract mates and warn off rivals. When a female picks a male whose call she likes, the male grabs her and squeezes across her back and around her abdomen. This causes the female to release her eggs. The male then fertilizes the eggs and, in some species, also guards them.

Situation: Sandra liked all creatures but loved to study frogs. Her sister Julie studied more about fish and butterflies. They both loved nature.

Question: Which sister heard more male frogs "ribbiting"?
Answer: Sandra

Situation: Sandra liked all creatures but loved to study frogs. Her sister Julie studied more about fish and butterflies. They both loved nature.

Question: Which sister heard fewer male frogs "ribbiting"?
Answer: Julie

Situation: Sandra liked all creatures but loved to study frogs. Her sister Julie studied more about fish and butterflies. They both loved nature.

Question: Which sister heard more frog calls during the day?
Answer: Sandra

Situation: Sandra liked all creatures but loved to study frogs. Her sister Julie studied more about fish and butterflies. They both loved nature.

Question: Which sister heard fewer frog calls during the day?
Answer: Julie

Situation: Sandra liked all creatures but loved to study frogs. Her sister Julie studied more about fish and butterflies. They both loved nature.

Question: Which sister heard fewer frog calls during the night?
Answer: Julie

Situation: Sandra liked all creatures but loved to study frogs. Her sister Julie studied more about fish and butterflies. They both loved nature.

Question: Which sister heard more frog calls during the night?
Answer: Sandra

Situation: Sandra liked all creatures but loved to study frogs. Her sister Julie studied more about fish and butterflies. They both loved nature.

Question: Which sister learned more about different calls used by different species of frogs?
Answer: Sandra

Situation: Sandra liked all creatures but loved to study frogs. Her sister Julie studied more about fish and butterflies. They both loved nature.

Question: Which sister learned less about different calls used by different species of frogs?
Answer: Julie

Situation: Sandra liked all creatures but loved to study frogs. Her sister Julie studied more about fish and butterflies. They both loved nature.

Question: Which sister learned less about males attracting female frogs to the bodies of water for mating?
Answer: Julie

Situation: Sandra liked all creatures but loved to study frogs. Her sister Julie studied more about fish and butterflies. They both loved nature.

Question: Which sister learned more about males attracting female frogs to the bodies of water for mating?
Answer: Sandra

Situation: Bob and Andy were two nature enthusiasts. They went camping together once a month. Bob was into bird watching, while Andy was fascinated with frogs and salamanders. They went on a trip last week-end and they were very happy with what they had observed.

Question: Which friend heard more males producing a mating call?
Answer: Andy

Situation: Bob and Andy were two nature enthusiasts. They went camping together once a month. Bob was into bird watching, while Andy was fascinated with frogs and salamanders. They went on a trip last week-end and they were very happy with what they had observed.

Question: Which friend heard fewer male frogs producing a mating call?
Answer: Bob

Situation: Bob and Andy were two nature enthusiasts. They went camping together once a month. Bob was into bird watching, while Andy was fascinated with frogs and salamanders. They went on a trip last week-end and they were very happy with what they had observed.

Question: Which friend heard fewer frog calls during the day?
Answer: Bob

Situation: Bob and Andy were two nature enthusiasts. They went camping together once a month. Bob was into bird watching, while Andy was fascinated with frogs and salamanders. They went on a trip last week-end and they were very happy with what they had observed.

Question: Which friend heard more frog calls during the day?
Answer: Andy

Situation: Bob and Andy were two nature enthusiasts. They went camping together once a month. Bob was into bird watching, while Andy was fascinated with frogs and salamanders. They went on a trip last week-end and they were very happy with what they had observed.

Question: Which friend heard more frog calls during the night?
Answer: Andy

Situation: Bob and Andy were two nature enthusiasts. They went camping together once a month. Bob was into bird watching, while Andy was fascinated with frogs and salamanders. They went on a trip last week-end and they were very happy with what they had observed.

Question: Which friend heard fewer frog calls during the night?
Answer: Bob

Situation: Bob and Andy were two nature enthusiasts. They went camping together once a month. Bob was into bird watching, while Andy was fascinated with frogs and salamanders. They went on a trip last week-end and they were very happy with what they had observed.

Question: Which friend observed more male frogs grabbing female frogs and squeezing them across the back?
Answer: Andy

Situation: Bob and Andy were two nature enthusiasts. They went camping together once a month. Bob was into bird watching, while Andy was fascinated with frogs and salamanders. They went on a trip last week-end and they were very happy with what they had observed.

Question: Which friend observed fewer male frogs grabbing female frogs and squeezing them across the back?
Answer: Bob

Situation: Bob and Andy were two nature enthusiasts. They went camping together once a month. Bob was into bird watching, while Andy was fascinated with frogs and salamanders. They went on a trip last week-end and they were very happy with what they had observed.

Question: Which friend observed fewer male frogs grabbing female frogs and squeezing them around the abdomen?
Answer: Bob

Situation: Bob and Andy were two nature enthusiasts. They went camping together once a month. Bob was into bird watching, while Andy was fascinated with frogs and salamanders. They went on a trip last week-end and they were very happy with what they had observed.

Question: Which friend observed more male frogs grabbing female frogs and squeezing them around the abdomen?
Answer: Andy