Which sentence below uses a colon correctly?
a. it is important to: eat well, sleep enough, drink water, and exercise.
b. it is important to keep healthy habits: eat well, sleep enough, drink water, and exercise.
c. it is: important to keep healthy habits, eat well, sleep enough, drink water, and exercise.

The sentence that uses a colon correclty is sentence B.

Explanation:

Sentence B uses a colon correctly. A colon means that is to say or here's what I mean. In the sentence above, the colon has been used to introduce a series of items. These items include eating well, sleeping enough, drinking water, and doing exercise. What is more, you should not capitalize the first item after the colon (eat well).

c) problem and solution