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.

[EX Q]: Question: Which single most factor is responsible for the extinction of hundreds of species of birds? Answer: human actions
[EX A]: Human actions is responsible for the extinction of hundreds of species of birds.

[EX Q]: Question: Which two processes in the water cycle are primarily responsible for the creation of a lake? Answer: precipitation and runoff
[EX A]: Precipitation and runoff in the water cycle are primarily responsible for the creation of a lake.

[EX Q]: Question: The pleura that surrounds the lungs consists of how many layers? Answer: two
[EX A]:
The pleura that surrounds the lungs consists of two layers.