Problem:OPTIONS:
- dishwater
- ocean water
- Water
- hydration
- moisture
- cactus fruit
- nutrients
- moist towels

Fact 1: Acactus stem is used for storing water. Fact 2: Moisture is stored in the spongy stem or root systems of the cactus during rainfall. Given the two facts above, what is a cactus stem used to reserve?
****
A: moisture

Problem:OPTIONS:
- fish
- mountain
- Bats
- tree
- humans
- Man
- rock
- Birds

Fact 1: Fish have a centralized nervous system with a brain. Fact 2: Brains are for important tasks, like thinking. Given the two facts above, what can think?
****
A: fish

Problem:OPTIONS:
- competition
- quitting
- A computer
- disappearing
- changing sizes
- exercise
- animals
- fun games

Fact 1: Behaviors can be learned through play. Fact 2: Games are fun to play. Given the two facts above, behaviors can be learned through what?
****
A: fun games

Problem:OPTIONS:
- body
- swea
- cilia
- motors
- heat
- fluid
- cold
- dorsal

Fact 1: Sweat is used for adjusting to hot temperatures by some animals. Fact 2: Generally the most effective way for animals to keep cool in hot weather is by sweating. Given the two facts above, how do animals keep cool?
****
A:
swea