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.

[Q]: Question: Exposure to what can increase the amount of pigment in the skin and make it appear darker? Answer: ultraviolet radiation
[A]: Exposure to ultraviolet radiation can increase the amount of pigment in the skin and make it appear darker.


[Q]: Question: What property of carbon and other elements can be used to date fossils and rocks, among other things? Answer: half-life
[A]: Half-life property of carbon and other elements can be used to date fossils and rocks, among other things.


[Q]: Question: The direction of the force of gravity is in what direction? Answer: straight line
[A]:
The direction of the force of gravity is in straight line direction.