In this task, you are given a question and a corresponding answer. Your task is to generate a fact statement that is useful in answering the given question.

[Q]: Question: A lion with bones protruding from underneath its fur has been? Answer: underfed.
[A]: as the amount of food an animal eats decreases , that organism will become thinner


[Q]: Question: A squirrel eats all of the acorns in a tree. The tree is empty, and the squirrel is still hungry, so? Answer: the squirrel leaves.
[A]: as the supply of food in an environment decreases , the population of animals in that environment will decrease


[Q]: Question: Unlike CO2, oxygen is a waste product of? Answer: cactus.
[A]:
In the photosynthesis process oxygen has the role of waste product