Explanation:

The correct answer is "is driving" because it is in the present continuous tense, which is used to describe an action that is happening at the moment of speaking.

- Present continuous tense:
The present continuous tense is formed by using the auxiliary verb "to be" in the present tense and adding the present participle (-ing) of the main verb.

For example:
- I am studying for my exam.
- She is cooking dinner right now.
- They are watching a movie.

In the given sentence, "Thomas ___________(drive) me home now", the verb "drive" needs to be in the present continuous tense because it is an action that is happening at the moment of speaking.

- The correct sentence would be: "Thomas is driving me home now."

This sentence indicates that Thomas is currently in the process of driving the speaker home.

- Other possible tenses:
However, if the sentence was in the past tense, it would be: "Thomas drove me home." This would indicate that the action of driving home already happened.

If the sentence was in the future tense, it would be: "Thomas will drive me home." This would indicate that the action of driving home will happen at a later time.