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: What determines the color of visible light? Answer: exact wavelength

SOLUTION: Exact wavelength determines the color of visible light.

PROBLEM: Question: The fact that water in a reservoir is elevated above the ground means that it has what kind of energy? Answer: potential

SOLUTION: The fact that water in a reservoir is elevated above the ground means that it has potential kind of energy.

PROBLEM: Question: The earliest known mammal fossils are from which period? Answer: early jurassic

SOLUTION:
The earliest known mammal fossils are from early jurassic period.