Where do most living things get the energy they need for life? A) either from air or food
B) either from sunlight or air
C) either from food or sunlight
D) either from air or water

The best answer choice is C. either from food or sunlight

Explanation:

Humans and Animals need to eat food to get energy

Plants use sunlight to create their own food.

The answer is letter c.  It can be both natural and human source of pollution.  There are times when the intense heat can trigger a brush fire and can expand depending on how strong the wind blows.  It can be caused by humans.  it could due to carelessness of people leaving flammable materials unchecked. Or using too much fuel that when lit would cause a brush fire that would expand into a wildfires.  The smoke from it pollutes the air.