In this task, you are given a fact statement and question based on the fact. Your task is to generate the correct answer for the question. The answer needs to be generated using the context fact statement.

Fact: living underground can be used for hiding from predators. Question: A mole can avoid being detected by hawks, owls and other predators by?
traveling beneath soil

Fact: smell is used for finding food by some animals. Question: Some animals are aided in finding food sources by?
aroma

Fact: crop rotation has a positive impact on soil quality. Question: The field a farmer plants with varied crops over the years is richer than?

a field where only grain is planted