input: OPTIONS:
- Water
- Gases
- oxygen
- hearts
- air
- fur
- skin
- lungs Now, answer this question: You are presented with the quiz "What do tadpoles use to breathe?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "skin is used for breathing air by frogs" and "every frog starts as a tadpole". So, what's the best answer to the question?
A:
output: skin
You are presented with the quiz "What are lakes formed by?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "lakes are formed by precipitation and runoff" and "rain is also known as precipitation". So, what's the best answer to the question?

OPTIONS:
- ice wedging
- hot and cold
- rain and runoff
- Condensation
- rice and beans
- Physical weathering
- flooding
- ice and sun

Answer: rain and runoff
Problem: OPTIONS:
- oxygen
- ice
- an ion
- NaCl
- potash
- Acids
- sugar
- h2o
Q: You are presented with the quiz "what can be added to a solid to decrease its freezing point?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "adding salt to a solid decreases the freezing point of that solid" and "for example, salt is NaCl". So, what's the best answer to the question?
Answer: NaCl
Problem:OPTIONS:
- energy
- cool off
- evaporation
- Heat energy
- reduced heat
- food
- reduce
- heat

You are presented with the quiz "why do animals sweat?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "if an animal sweats then that animal 's bodily water decreases" and "just like sweating, the evaporation of the water cools the body". So, what's the best answer to the question?
****
A: cool off
You are presented with the quiz "What causes water vapor to condense?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "water vapor cooling causes that water vapor to condense" and "all carcasses are chilled with cool air for 48 hours". So, what's the best answer to the question?
OPTIONS:
- water vapor exploding
- water vapor heating up
- water vapor disappearing
- circulatory systems
- aqueous solution
- Heat energy
- water vapor chilling
- Evaporation
water vapor chilling
You are presented with the quiz "_ can change liquid to gas." But you don't know the answer, so you turn to your teacher to ask for hints. He says that "heat can change the state of matter" and "matter exists in a solid, liquid or gas state and can change forms". So, what's the best answer to the question?
OPTIONS:
- magnetism
- cycles
- energy
- vapors
- condensation
- gravity
- thirst
- Heat

Answer:
Heat