Predators often feed on weak or
sick animals in an ecosystem. the
role of the predator is described as
its ..what? : )

Predators are above all other organisms below it.  Usually as one moves up the

food chain, certain chemicals are concentrated as they move up the food chain.

Examples of this are mercury and PCB.

I THINK the correct answer would be Niche.

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation: