Question

you get in your car, turn the key, and your car wont start. what is the likely malfunction? your car is overheated. your brake lights are out. your battery is dead. you have a flat tire.

Explanation:

A dead battery is a common reason for a car not starting when the key is turned. Overheating usually affects running - not starting. Brake lights being out or a flat tire don't prevent starting.

Answer:

Your battery is dead.