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: uneven heating of the Earth 's surface cause wind.
[A]: heating is warming.


[Q]: Fact: electricity is used as an energy source by electrical devices.
[A]: device phone.


[Q]: Fact: Cuticle helps prevent water loss, abrasions, infections, and damage from toxins.
[A]:
cuticle is.