The highest level of ecological hierarchy is

Options

A. Ecosystem
B. Biosphere
C. Biome
D. Landscape.

Answer

To determine the highest level of ecological hierarchy, we need to analyze the options provided:

1. **Ecosystem**: An ecosystem is a community of living organisms interacting with their physical environment. It includes both biotic (living) and abiotic (non-living) components. However, it is not the highest level of ecological hierarchy.

2. **Biosphere**: The biosphere is the global sum of all ecosystems. It represents the zone of life on Earth, encompassing all living organisms and their relationships with the environment, including land, water, and the atmosphere. This is the highest level of ecological hierarchy.

3. **Biome**: A biome is a large geographical biotic unit, a major community of plants and animals with similar life forms and environmental conditions. Biomes consist of multiple ecosystems, but they are not the highest level.

4. **Landscape**: A landscape refers to a mosaic of ecosystems and is characterized by a particular landform or area. It does not represent a fixed natural boundary and is not the highest level of ecological hierarchy.

After analyzing all the options, we conclude that the highest level of ecological hierarchy is the **biosphere**.

**Final Answer**: The highest level of ecological hierarchy is **Biosphere (Option B)**.

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