Plants were eaten first

Early humans had to find food to eat.

Plants were the most available source.

A) Plants provided a variety of nutrition.

B) Immobility

    Plants were easy to access since they could not move to escape forgers.

C) No battle

     For the most part, as in contrast with many mobile animals, plants have little to defend

     themselves by. They offered little counterforce to forgers.

Therefore, very likely that plants were the first source of food consumption for early humans.