Problem:OPTIONS:
- human
- water vapor
- mammals
- scales
- It expands
- permeable
- furry
- to stay warm

You are presented with the quiz "what type of skin easily absorbs air to breathe through" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "amphibians have permeable skin that easily absorbs substances from the environment" and "amphibians have lungs, but they also breathe through their skin". So, what's the best answer to the question?
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A: permeable

Problem:OPTIONS:
- birds
- Light
- Heat
- LEDs
- sunshine
- engines
- storms
- lamps

You are presented with the quiz "A battery can convert chemical energy so that it can turn on what?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "abattery converts chemical energy into electrical energy" and "electrical energy is used to power a lamp". So, what's the best answer to the question?
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A: lamps

Problem:OPTIONS:
- arsenic compounds
- a pathogens
- tapeworms
- deforestation
- deoxyribonucleic acid
- Pesticides
- cigarettes
- fossil fuels

You are presented with the quiz "What causes harm to living things?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "poison causes harm to living things" and "arsenic compounds are poisonous". So, what's the best answer to the question?
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A: arsenic compounds

Problem:OPTIONS:
- liquid to evaporate
- water to flow
- dirt to form
- permineralization
- Heat energy
- erosion
- water to form
- less water

You are presented with the quiz "Condensing causes" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "condensing causes a liquid to form" and "oil and water are two such liquids". So, what's the best answer to the question?
****
A:
water to form