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: What substance is created when a copper turns from reddish brown to greenish brown? Answer: copper oxide
[EX A]: Copper oxide substance is created when a copper turns from reddish brown to greenish brown.

[EX Q]: Question: What process is most responsible for the extinction of most species of plants and animals that have lived on Earth? Answer: environmental changes
[EX A]: Environmental changes is most responsible for the extinction of most species of plants and animals that have lived on earth.

[EX Q]: Question: Spores are generally produced through what type of reproduction? Answer: sexual
[EX A]:
Spores are generally produced through sexual reproduction.