Vertical Lists, Bullets

Q. Which of the following is correct to introduce a list?

1. My service includes:
2. My service includes

Should the colon be used after the word “includes”? From my understanding, a colon should not be used after a verb (or a preposition). Also, the sentence “My service includes” is not a complete sentence by itself.

A. You are right. “My service includes” is not grammatically complete, because the transitive verb “includes” is missing a direct object. If you wrote “My service includes the following,” a colon should follow.