TASK DEFINITION: In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.
PROBLEM: Question: Which of these can be mined from Earth and used as an energy source? Answer: Coal

SOLUTION: Coal can be mined from earth and used as an energy source.

PROBLEM: Question: Which is a function of the cardiovascular system? Answer: to transport gases throughout the body

SOLUTION: One function of the cardiovascular system is to transport gases throughout the body.

PROBLEM: Question: Most of the heat that enters the mesosphere comes from where? Answer: the stratosphere

SOLUTION:
Most of the heat that enters the mesosphere comes from the stratosphere.