Which term best describes the interactions between living organisms and their physical environment?

• A. Mutation
• B. Gene pool
• C. Homeostasis
• D. Ecosystem

Answer: (D)

Verified step by step guidance

1. Step 1: Begin by understanding the key terms provided in the question. Mutation refers to changes in the DNA sequence, which is unrelated to interactions between organisms and their environment. Gene pool refers to the collection of genetic information within a population, which is also unrelated to the physical environment.
2. Step 2: Examine the term 'Homeostasis.' This refers to the ability of an organism to maintain internal stability despite changes in the external environment. While it involves interactions with the environment, it is focused on internal regulation rather than the broader interaction between organisms and their physical surroundings.
3. Step 3: Focus on the term 'Ecosystem.' An ecosystem is defined as a community of living organisms (plants, animals, and microorganisms) interacting with each other and their physical environment (such as air, water, and soil). This term directly addresses the interactions described in the question.
4. Step 4: Compare the definitions of all the terms provided and identify which one best fits the description of interactions between living organisms and their physical environment. The term 'Ecosystem' clearly aligns with this concept.
5. Step 5: Conclude that the correct answer is 'Ecosystem,' as it encompasses the interactions between living organisms and their physical environment, which is the focus of the question.