input with options: Fact 1: Ice wedging is when ice causes rocks to crack by expanding in openings. Fact 2: Water in the cracks of rocks freeze and expand. Given the two facts above, ice wedging is when water ?
OPTIONS:
- coldest season
- Metling snow
- freezes and contracts
- freezes and melts
- mouth of rivers
- In the winter
- freezes and condenses
- freezes and expands
output: freezes and expands

input with options: Fact 1: Mammals can also generate little bursts of heat by shivering. Fact 2: Heat is produced by muscle action and shivering. Given the two facts above, what can mammals generate heat with?
OPTIONS:
- Muscle action
- with their fur
- fur and fat
- layers of fat
- hair
- Animal fur
- waistlines
- Bone action
output: Muscle action

input with options: Fact 1: Flagella help prokaryotes move. Fact 2: Prokaryotes All bacteria are prokaryotes. Given the two facts above, what uses flagella to move?
OPTIONS:
- fungi
- barnacles
- fish
- cacti
- humans
- Most plants
- bacteria
- h2o
output: bacteria

input with options: Fact 1: Treating water is used to remove harmful substances before drinking. Fact 2: Hydration is maintained by drinking a lot of fluid. Given the two facts above, what is treating water to remove harmful substances done before?
OPTIONS:
- vaporization
- bacteria
- evaporation
- hydration
- dangerous
- Frogs
- Relieve pain
- a pathogens
output:
hydration