Multiple choice What are the constituents of environment? Air, water, land Air, water, land and plants Air, water, land, plants and animals Air, water land, plants, animals and micro organisms Reveal answer Fill a bubble to check yourself D Correct answer Explanation The environment is a complex system consisting of both abiotic factors (air, water, land) and biotic factors (plants, animals, and microorganisms). Option D is the most comprehensive definition provided.