Question

which activity is a risk to one’s health?
not wearing a seatbelt
exercising more than 60 minutes a day
using walking as one’s sole aerobic activity
being a strict vegetarian

Explanation:

Not wearing a seat - belt increases the risk of injury or death in case of a vehicle collision. Exercising more than 60 minutes a day can be beneficial for health if done properly. Walking as a sole aerobic activity can be a good form of exercise. Being a strict vegetarian can be a healthy diet if well - planned to meet all nutritional needs.

Answer:

not wearing a seatbelt