The correct answer is
<span>C.Predator-Prey </span>
In developed nations people have more fast food options which lead to cardiovascular disease. As well as screen time all day since this is one of the factors of cardiovascular disease. Undeveloped nations don't have fast-food or television to watch all day, since they play outside.
An ecosystem is a community of biological organisms that interact within their overall environment. One level up from this is a biome which is a very large geographical area which consists of very particular biological communities that share a similar environment and ecosystem.