Which of the statements does not describe ecosystems? biodiversity is one way to judge the health of an ecosystem. ecosystems must be balanced to survive. the parts of an ecosystem exist independently and have little to do with each other. people's activities sometimes improve the health of an ecosystem

"The parts of an ecosystem exist independently and have little to  do with each other." -- this does not describe ecosystems.

All organisms and components in an ecosystem affect each other's well being. Balance is important and any activity within the ecosystem can affect some if not all of the organisms within it.

Truehope this : )