Final answer:
It is illegal to leave children ages six or younger in the car on a hot day.
Step-by-step explanation:
The correct answer is a) True.
It is indeed illegal to leave children ages six or younger in the car on a hot day. This is due to the dangers of overheating, which can lead to heatstroke and even death. Leaving a child unattended in a hot car is considered negligence and can be subject to legal consequences.
The primary topic of this question is the legality and safety of leaving young children in a hot car.