Species diversity: is not predictable relative to how close an ecosystem is to the equator. decreases as you move away from the equator in both terrestrial and marine ecosystems. increases as you move away from the equator in both terrestrial and marine ecosystems. decreases as you move away from the equator in marine ecosystems, but increases as you move away from the equator in terrestrial ecosystems. decreases as you move away from the equator in terrestrial ecosystems, but increases as you move away from the equator in marine ecosystems.

A. decreases as you move away from the equator in both terrestrial and marine ecosystems.

Explanation:

Most of the population of animals in both terrestrial and marine ecosystems lives near the equator because temperature is favorable and there is more food available in the form of producer (plants). When we go away from the equator towards poles, the temperature decreases and also food is unavailable in large quantity so the population of organisms decreases in both terrestrial and marine ecosystems.

it's A.

Explanation:

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.