Trophic level

the same way that you take advantage of your friend's power bank when your phone is on 4%.

Those links in the chain organize species into trophic levels, which are the groups of species in a food chain that share the same relationship to the flow of energy through the ecosystem.

The beaver is the second rung in our food chain, a primary consumer of the clover.

The fox that eats the beaver is a secondary consumer, and the eagle that eats the fox is a tertiary consumer.