Fill in the blank with the correct modal. Choose from the following:

You _____ to be over 18 to drive a car.

need

The correct answer is Option (3) → need

So, the sentence should be: "You need to be over 18 to drive a car."

Explanation:
- The modal "need" is used to express necessity or obligation. In this sentence, it indicates the requirement or obligation of being over 18 years old in order to drive a car legally.
- The sentence conveys that it is necessary or required for someone to be over 18 years old in order to drive a car.