Which term means the living organisms in an ecosystem?

• A. Biotic
• B. Mortality
• C. Cell
• D. Fungi

Answer: (A)

In ecology, the living parts of an ecosystem are described as biotic factors. This term covers all organisms—plants, animals, fungi, bacteria, and any other living beings—together as the living component that interacts within the environment. Abiotic factors are the nonliving parts like sunlight, water, minerals, and climate. Mortality is about death rates within populations, not the entire living community. A cell is the basic unit of life, not the collection of all living organisms in the ecosystem. Fungi are one type of living organism, but naming a single group doesn’t describe the whole living community. Therefore, biotic best fits for the term describing the living organisms in an ecosystem.