Which of the following statements best describes the principles behind the gaia hypothesis? a) the earth behaves as a self-regulating system of physical and biological processes. b) actions by one organism in an ecosystem must affect other organisms in the system. c) changes in input to a system result in linear or nonlinear changes to the output of the system. d) positive feedback generally results in the destabilization of a system.

The answer is C i did the test on it .

Option A, The Earth behaves as a self-regulating system of physical and biological processes.

Explanation:

The main idea of Gaia hypothesis is that all living substance on planet earth are surrounded by non living substance and both these living and non-living substances are integrated into a system which is self regulating thererby maintaining the earth's environment at a favorable condition to cherish life forms in it.

Abiotic component such as water, air, soil etc. exists in a well balanced system with the biosphere to maintain the habitability aspects of the planet.

hence, option A is correct.