Which statement about limiting factors is true? a. they are the same in each ecosystem. b. they are the same for every organism. c. they vary from ecosystem to ecosystem. d. they always involve available oxygen.

The correct answer is option C, The vary from ecosystem to ecosystem

The factors which limitizes  the growth of an ecosystem are called limiting factor. The four common limiting factors are food, water, shelter and space which is same for all organisms while there are some abiotic factors that limit ecosystem growth  such as temperature, precipitation, sunlight, soil configuration, and soil nutrients which are also same. But some time there can be special factors which may limitise the ecosystem growth and thus option C is the apt answer