Problem:OPTIONS:
- whales
- weathering
- Energy.
- minute plants
- Chlorophyll
- an organism's body
- Germy surfaces
- humans

You are presented with the quiz "what do zooplankton feed on?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "zooplankton are tiny animals that feed on phytoplankton" and "minute plants are known as phytoplankton". So, what's the best answer to the question?
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A: minute plants

Problem:OPTIONS:
- living and growing
- flow of electrons
- potting and soiling
- manuring
- fertilizing
- nutrients
- reproduce
- bloom time

You are presented with the quiz "Plants require sunlight for what?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "aplant requires sunlight for photosynthesis" and "all plants live and grow by photosynthesis". So, what's the best answer to the question?
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A: living and growing

Problem:OPTIONS:
- sweating
- batteries
- pancreas
- electron
- insulin
- alveoli
- oxygen
- sunlight

You are presented with the quiz "Cells obtain energy from the blood with the help of" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "insulin helps cells take up glucose from the blood" and "blood Glucose Blood Glucose Glucose is the principal source of energy for mammalian cells". So, what's the best answer to the question?
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A: insulin

Problem:OPTIONS:
- Light energy
- money
- wealth
- sunlight
- The Sun
- food and shelter
- energy
- Mechanical energy

You are presented with the quiz "What do most plants continue to use throughout their lives?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "most plants continue to grow throughout their lives" and "plants use the light energy to grow". So, what's the best answer to the question?
****
A:
Light energy