Problem:OPTIONS:
- Reproducing
- growth
- Obtaining nutrients
- Photosynthesizing
- survival
- staying warm
- Storing water
- support

You are presented with the quiz "What do bees aid many plants in doing?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "plant reproduction requires pollination" and "many plants are pollinated by bees". So, what's the best answer to the question?
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A: Reproducing

Problem:OPTIONS:
- animals
- plants
- bacteria
- nonliving things
- gravity
- density
- the skin
- insects

You are presented with the quiz "what do viruses infect?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "viruses infect and live inside the cells of living organisms" and "plants and animals are organisms". So, what's the best answer to the question?
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A: animals

Problem:OPTIONS:
- cigarettes
- Chlorophyll
- Chemical energy
- aerobic capacity
- fossil fuels
- Fully cooking the oysters
- smoking cigarettes
- excess body weight

You are presented with the quiz "What raises metabolism?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "mammals generate heat mainly by keeping their metabolic rate high" and "excess body weight raises metabolic heat production". So, what's the best answer to the question?
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A: excess body weight

Problem:OPTIONS:
- elms
- trees
- plants
- bamboo
- non-woody trunks
- snails
- edible
- daffodils

You are presented with the quiz "a living thing with four divisions can be what with woody trunks?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "most modern gymnosperms are trees with woody trunks" and "gymnosperms comprise four divisions". So, what's the best answer to the question?
****
A:
trees