I'd say that the aspect of a problem-and-solution essay that refers to the process of putting the solution into effect is implementation. The correct answer is A.
Explanation:
The answer is implementation because it means exactly to put into action a statement. To put an idea into effect. It means to execute. In an essay of this kind, the idea is executed in order to demonstrate the solution, in order to go through the problem and the way to solve it by executing the initial statement.
If the comedy is being used to make fun of someone of something it could be taken the wrong way. It could be offensive to someone. If the comedy is spoken to offend someone or hurt their feelings then most people would react in an upset manner.
It would be A. because the selection said, "The more scientist's listen to these kind of recordings, the more they notice when expected call are missing".
