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: Someone stranded in the Sahara can potentially save their life with a? Answer: prickly plant's trunk.
[A]: a cactus stem is used for storing water


[Q]: Question: Glacier melt? Answer: is an effect of an abundance of CO2 in the environment.
[A]: if the atmospheric temperature rises then the glaciers will melt


[Q]: Question: Even items such as rocks mass can be changed due to which process? Answer: Weathering.
[A]:
weathering means breaking down surface materials from larger whole into smaller pieces by weather