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: stalactites are formed by deposition. Question: The ceiling of the cave grew closer to the ground due to:?
deposition

Fact: if an organism dies then the population of that organism will decrease. Question: One day a zebra dies. Zero baby zebras were born in the herd on that day.?
the population went down

Fact: as dryness increases in an environment , the available water in that environment will decrease. Question: After a storm?

creek beds may be spilling over