Question: Fact 1: Population density is the average number of individuals per unit of area or volume. Fact 2: Economy is affected by population size and density. Given the two facts above, what is affected by the average number of individuals per unit of area or volume?
OPTIONS:
- goats
- economy
- cows
- animals
- vegetation
- mammals
- bushes
- wind
Answer: economy

Question: Fact 1: Smoking causes direct damage to the lungs. Fact 2: Smoke from cigarettes contains tar, which sticks to the cilia in our lungs. Given the two facts above, what causes damage to the lungs?
OPTIONS:
- breathing
- tar
- HPV
- fire
- CFCs
- sunshine
- coal
- mist
Answer: tar

Question: Fact 1: The Earth revolving around the Sun causes the seasons to change on its axis. Fact 2: Also, the Earth revolving around the sun creates the seasons. Given the two facts above, what causes seasons?
OPTIONS:
- rain
- kalenchoes
- drought
- subtropical
- climate
- space
- clouds
- revolving
Answer:
revolving