Final answer:
The full range of environmental conditions under which an organism can exist describes its niche, which includes how it obtains resources, its interactions with other organisms, and the abiotic factors it can tolerate.
Step-by-step explanation:
The full range of environmental conditions (biological and physical) under which an organism can exist describes its niche. An organism's niche includes all aspects of its life, such as how it gets food, how it interacts with other organisms, and the abiotic factors it can tolerate. All species, including plants and animals, are adapted to the conditions prevailing in the environment in which they evolved. This adapts them to specific ranges of soil types, sunlight intensity, atmospheric conditions, and temperature ranges. The environment affects organisms through factors like temperature, water availability, and oxygen concentration, influenced by processes such as radiation, diffusion, and biotic interactions. The habitats, which refer to the physical areas where species live, also determine the communities and ecosystems by influencing the traits organisms need to survive with the inclusion of both abiotic and biotic factors.