Two ropes are used to support a
stationary weight W. The tensions
in the ropes must:

1.) They store chemical energy in carbohydrate food molecules they build themselves. Food is chemical energy stored in organic molecules. most autotrophs transform sunlight to make food, we call the process they use Photosynthesis. 2.) Consumers 3.) Heterotrophs cannot make their own food, so they must eat or absorb it. 4.) Consumers include all animals and fungi and many protists and bacteria.