The highest level of organization among following is :

Options

A. ecosystems
B. Biosphere
C. populations
D. communities

Answer

To determine the highest level of organization among the options provided, we can follow these steps:

### Step-by-Step Solution:

1. **Define Population**: A population is a group of organisms of the same species that live in a particular habitat. It represents the first level of organization in ecology.

2. **Define Community**: A community is formed when different populations of various species interact in a specific area. It includes multiple populations and represents a higher level of organization than a population.

3. **Define Ecosystem**: An ecosystem consists of a community of living organisms (biotic components) interacting with their physical environment (abiotic components). This includes interactions among organisms and between organisms and their environment, making it a more complex level of organization than a community.

4. **Define Biosphere**: The biosphere is the highest level of organization. It encompasses all ecosystems on Earth, including all living organisms and their environments. It represents the sum of all ecosystems and is the broadest level of ecological organization.

5. **Conclusion**: Based on the definitions and levels of organization, the highest level of organization among the options is the **Biosphere**.

### Final Answer:
The highest level of organization among the following is **Biosphere**.

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