The branch of science which studies the ineractions among organisms and between organisms and physical environment is called as

Options

A. epidemiology
B. ecology
C. ethology
D. etiology

Explanation

To answer the question regarding the branch of science that studies the interactions among organisms and between organisms and their physical environment, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Question**: We need to determine which branch of science focuses on the interactions among organisms and their environment.

2. **Evaluate the Options**: The question provides several options:
- Option 1: Epidemiology
- Option 2: Ecology
- Option 3: Ethology
- Option 4: Etiology

3. **Analyze Each Option**:
- **Epidemiology**: This branch studies the distribution and determinants of health-related states or events in specified populations. It does not primarily focus on interactions among organisms and their environment.
- **Ecology**: This is the study of the interrelationships between organisms and their natural environment, including both living (biotic) and non-living (abiotic) components. This matches the question perfectly.
- **Ethology**: This is the science of animal behavior, focusing on how animals interact with each other and their environment, but it does not encompass the broader interactions among all organisms.
- **Etiology**: This branch studies the causes of diseases and conditions, which is not related to the interactions among organisms and their environment.

4. **Select the Correct Answer**: Based on the analysis, the correct answer is **Ecology** (Option 2), as it specifically studies the interactions among organisms and between organisms and their physical environment.

### Final Answer:
The branch of science which studies the interactions among organisms and between organisms and the physical environment is called **Ecology**.

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