Prove the connection between plants and predators, create food chains. What place in the food chain can a person occupy.

The proof of the above statement is food chains: Leaves (litter) – earthworm – bear – common hedgehog – owl (owl is possible); algae – crustaceans – fish – osprey; grass – hare (deer) – wolf; phytoplankton – zooplankton – fish – predatory fish – man and others, if you look at it, man hunts various predatory animals and uses not only and not so much their meat for food, but the skins of these animals, bones, etc. Primitive man, according to confirmed data, fed himself and his offspring mainly by gathering, from this it follows that the main diet is food of plant origin, various mollusks and small animals could have been a source of protein (until a person learned to hunt).