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: Which crust lies deep inside the ocean? Answer: oldest

SOLUTION: Oldest crust lies deep inside the ocean.

PROBLEM: Question: Does blood flow increase or decrease when blood vessels constrict? Answer: decrease

SOLUTION: Blood flow decrease when blood vessels constrict.

PROBLEM: Question: What is it called when a new species arises without geographic separation? Answer: sympatric speciation

SOLUTION:
Sympatric speciation is when a new species arises without geographic separation.