Branch of Biology dealing with interactions of organisms and environment is

Options

A. Phytogeography
B. Palaeobiology
C. Ecology
D. Physiology.

Answer

To solve the question "Branch of Biology dealing with interactions of organisms and environment is," we will analyze the options provided and identify the correct answer step by step.

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for a specific branch of biology that focuses on the interactions between organisms and their environment.

2. **Evaluate the Options**:
- **Option 1: Phytogeotrophy**: This branch deals with the geographical distribution of plants. It does not focus on the interactions between organisms and their environment.
- **Option 2: Paleobiology**: This branch studies the fossils of plants and animals. It is concerned with ancient life forms and their environments, but it does not specifically address current interactions.
- **Option 3: Ecology**: This branch of biology specifically studies the interactions between organisms and their environment. It looks at how living things interact with each other and with their surroundings.
- **Option 4: Physiology**: This branch focuses on the normal functions of living organisms. While it may touch on how organisms interact with their environment, it does not primarily deal with those interactions.

3. **Identify the Correct Answer**: Based on the evaluations:
- The only option that directly addresses the interactions between organisms and their environment is **Option 3: Ecology**.

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

### Final Answer:
The branch of biology dealing with interactions of organisms and environment is **Ecology**.

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