Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: Optics explains the behavior of visible light and electromagnetic waves.

Answer: What type of physics explains the behavior of visible light and electromagnetic waves?


Question: Warm and humid temperature and moisture conditions describe an air mass that originates over the atlantic ocean near the equator.

Answer: Which temperature and moisture conditions describe an air mass that originates over the Atlantic Ocean near the equator?


Question: Oxygen is made by trees and other plants during photosynthesis.

Answer:
What is made by trees and other plants during photosynthesis?