The term used to describe all the species and physical factor at a site is the -

Options

A. ecology
B. habitat
C. ecosystem
D. community

Answer

To answer the question, "The term used to describe all the species and physical factors at a site is the -", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Components**: The question asks about a term that encompasses both species (biotic factors) and physical factors (abiotic factors) in a specific area.

2. **Define Key Terms**:
- **Ecosystem**: This is the term that describes the interaction of living organisms (plants, animals, microorganisms) with each other and with their physical environment (air, water, soil, temperature, etc.).
- **Ecology**: This is the study of ecosystems and their interactions but does not describe the components themselves.
- **Habitat**: This refers to the specific environment where a particular species lives, but it does not encompass all species and physical factors.
- **Community**: This term refers to a group of different species living in a particular area but does not include the abiotic factors.

3. **Identify the Correct Term**: Given the definitions, the term that includes all species and physical factors at a site is "Ecosystem."

4. **Conclusion**: Therefore, the correct answer to the question is "Ecosystem."

### Final Answer:
The term used to describe all the species and physical factors at a site is the **Ecosystem**.

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