instruction:
Given a scientific passage and an answer, generate a question for the given answer.
question:
Passage: Runoff is likely to cause more erosion if the land is bare. Plants help hold the soil in place. The runoff water in Figure below is brown because it eroded soil from a bare, sloping field. Can you find evidence of erosion by runoff where you live? What should you look for?. Answer: erosion
answer:
Runoff is likely to cause more what if the land is bare?

question:
Passage: The mechanical advantage of a machine is the factor by which the machine changes the input force. It equals the ratio of the output force to the input force. A wheel and axle may either increase or decrease the input force, depending on whether the input force is applied to the axle or the wheel. Answer: mechanical advantage
answer:
What is indicated by the ratio of the output force to the input force in a machine?

question:
Passage: Sexual reproduction occurs when spores from two parents fuse and form a zygospore. Answer: zygospore
answer:
What forms when the spores from two parents fuse during sexual reproduction?