An ecosystem is defined as.. А.) a group of organisms and the habitat they share.
B.) the food chain in an area.
C.) a predator and prey relationship.
D.) the creation of carbohydrates by green plants.​

The correct answer is A

The answer is A.) a group of organisms and the habitat they share.

The separation of powers provides a system of shared power known as Checks and Balances. Three branches are created in the Constitution. ... The Supreme Court can rule a law to be unconstitutional, but the Congress, with the States, can amend the Constitution. All of these checks and balances, however, are inefficient.