In this task, you need to write a topic word from the given fact. The topic word must have at least one word overlap with the given fact. The topic word often involves adding a new word from a related concept. In your topic word, use at least one word from the given fact. Topic words with two or more words work best.

[Q]: Fact: Gene flow occurs when individuals move into or out of a population.
[A]: Gene flow.


[Q]: Fact: when a hemisphere is tilted towards the sun , that hemisphere receives more direct sunlight.
[A]: direct during sunlight summer.


[Q]: Fact: Urine leaves the body through a sphincter in the process of urination.
[A]:
liquid waste urine.