In an introduction to ecosystems, which statement best describes what an ecosystem contains?

• A. Only the nonliving physical environment (abiotic factors) in a given area
• B. All individuals of a single species living in a given area
• C. A community of organisms interacting with each other and with their physical (abiotic) environment
• D. Only the living organisms (biotic factors) in a given area

Answer: (C)

Verified step by step guidance

1. Step 1: Understand the definition of an ecosystem. An ecosystem includes both living (biotic) and nonliving (abiotic) components in a specific area.
2. Step 2: Identify biotic factors as all living organisms such as plants, animals, bacteria, and fungi that interact within the ecosystem.
3. Step 3: Identify abiotic factors as the nonliving physical environment, including elements like sunlight, water, temperature, soil, and air.
4. Step 4: Recognize that an ecosystem is characterized by the interactions between biotic and abiotic factors, forming a complex and dynamic system.
5. Step 5: Conclude that the best description of an ecosystem is a community of organisms interacting with each other and with their physical (abiotic) environment.