The act of eating is a service.

[BrownEye]

In 3D there actually is "separation" as part of the experiment. To imagine that we are not in 3D is kind of avoidance of 3D.

I will post a childrens explanation that I put up on DI.

The Mysterious Everything flows in bite sized chunks (literally) through life, from one living thing to another living thing to another living thing, and so on and so on, but not forever. ("Energy's One Way Trip"). Matter also flows through life, but in this section we are only talking about energy.
This flow of energy is transported through the animals by a system biologists call the food chain.

energy on land moves from plant to animal to animal in bite sized chunks. For almost all animals, the energy that allows them to "keep on going" comes from the sun. But animals can't get energy directly from the sun (except sometimes for warmth). They need help. In the ocean, that help comes from a whole bunch of little tiny greenish critters (organisms might be the word more sophisticated sources would use) called phytoplankton (or photoplankton?).
Phytoplankton do for ocean animals what the green plants on land do for the land animals. They make themselves into food for everyone else.
Isn't that thoughtful?

Yup, they are the ones (pretty much the only ones in the ocean) that turn sunlight and carbon and oxygen into glucose and other simple sugars (by a process called photosynthesis) and other molecules that animals can eat. From this tiny but very numerous beginning the sun's energy begins its progression up through the food chain.

But as the energy moves up the food chain from phytoplankton to animal to animal there is less and less of it available for animals to use (see the previous section on Energy Flow through Plants and Animals).

Because there is less and less energy to go around as it moves through the animal food chain, there are less and less animals; and even though some of the animals get pretty big, the total mass and weight of those animals is much less than the total mass and weight of the Primary Producers. The little Primary Producers in the oceans have to keep busy - not just busy making carbohydrates from sunlight, but also busy reproducing themselves. The typical life span of one of these little phytoplankton critters is just 1 to 5 days. So we need them to stay focussed, stay numerous, and keep busy, busy, busy. All other living things depend on them.

Black bears and brown bears are in our omnivorous club. And pigs we think. Can you think of any others?
I can't think of anything better than being an omnivore. We can be either primary or secondary consumers. It's so empowering!

I can't think of anything more empowering than being similar to a bear or pig. LMAO!

http://www.ftexploring.com/me/pyramid.html