Problem:OPTIONS:
- tree falls
- Mutations
- Plants growth
- movement
- competition
- adding heat
- contamination
- Dehydration

You are presented with the quiz "What can happen during the reproduction process?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "reproduction is the process by which organisms give rise to offspring" and "mutations are sources of variations in offspring". So, what's the best answer to the question?
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A: Mutations

Problem:OPTIONS:
- The Earth
- a prism
- The sun.
- A shadow
- heat
- heat energy
- Solar energy
- The moon

You are presented with the quiz "What does the light on the moon come from?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "the moon revolving around the Earth causes the phases of the moon" and "phases of the Moon are caused by a shadow from the Earth". So, what's the best answer to the question?
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A: The sun.

Problem:OPTIONS:
- bright lights
- twigs
- vehicles
- Gunshots
- humans
- soft noises
- Movement
- people

You are presented with the quiz "what cause loud noises to animals" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "loud noises can cause animals to startle" and "gunshots startle the quiet". So, what's the best answer to the question?
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A: Gunshots

Problem:OPTIONS:
- migraines
- pollen
- cancer
- orchids
- genes
- a cuticle
- A computer
- mitosis

You are presented with the quiz "What is more complex in eukaryotes than prokaryotes?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "cell division is more complex in eukaryotes than prokaryotes" and "mitosis is cell division". So, what's the best answer to the question?
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A:
mitosis