Which of the following is NOT a physical factor that is abiotic?

Animal habitats are considered biotic factors because they involve living organisms and their interactions within ecosystems. While physical factors that are abiotic include elements such as soil, sunlight, and rainfall—none of which are derived from living organisms—animal habitats specifically encompass the environments where animals live, which are shaped and influenced by those organisms themselves.

Soil, as a physical factor, provides a medium for plant growth and serves as a habitat for various organisms. Sunlight is essential for photosynthesis and influences temperature and weather patterns. Rainfall is a crucial component of the water cycle and directly impacts water availability for various organisms. All of these are abiotic factors because they do not contain any living components, but rather represent the non-living physical and chemical elements of an ecosystem.