The answer is definitely 3
Mental health is pretty important since it includes our emotional, psychological, and social well being. It also affects how we act, think, and feel. It also determines how we make choices and how we can relate to others
if a person has a lifestyle where they eat mcdonalds everyday or they only eat fastfood they are more likely to get diabetes, heart disease, or cancer because fastfood like that isnt really food and i would tell you what its made out of to make more of a point but i'll spare you the gory details (*cough* tho i must say velveta has no dairy in it what so ever:) sorry)
Heat exhaustion is when your body starts to decline from the heat but not too much and your body just starts to get exhausted from the heat but with a heat stroke your body just starts to give up and it's too much heat almost similar to an regular stroke just with heat *hope this helps*
