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: unequal heating of Earth 's surface by the Sun causes global wind patterns.
[A]: earth our planet.


[Q]: Fact: Cells are programmed to divide only a set number of times.
[A]: Cells divide.


[Q]: Fact: Glucose is used for energy by the cells of most organisms.
[A]:
Glucose food.