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: How does the magnetic field produced by a current in a wire move? Answer: in concentric circles

SOLUTION: The magnetic field produced by a  current in a wire moves in concentric circles.

PROBLEM: Question: What process is most responsible for the extinction of most species of plants and animals that have lived on Earth? Answer: environmental changes

SOLUTION: Environmental changes is most responsible for the extinction of most species of plants and animals that have lived on earth.

PROBLEM: Question: Lichens are not a single organism, but rather an example of a what? Answer: mutualism

SOLUTION:
Lichens are not a single organism, but rather an example of a mutualism.