An ecosystem contains

Options

A. Green plants and animals
B. Green plants and decomposers
C. Green plants, animals, decomposers, and abiotic environment
D. Producers and consumers

Answer

To answer the question "An ecosystem contains," we can break down the components of an ecosystem into two main categories: biotic and abiotic components.

### Step-by-Step Solution:

1. **Understanding Ecosystem Components**:
- An ecosystem is made up of both living (biotic) and non-living (abiotic) components.

2. **Identifying Biotic Components**:
- The biotic components include:
- **Producers**: These are typically green plants that produce energy through photosynthesis.
- **Consumers**: These include animals that consume plants and other animals for energy.
- **Decomposers**: These are organisms like fungi and bacteria that break down dead organic matter, recycling nutrients back into the ecosystem.

3. **Identifying Abiotic Components**:
- The abiotic components include:
- **Soil**: Provides nutrients and a medium for plant growth.
- **Water**: Essential for all living organisms.
- **Gases**: Such as oxygen and carbon dioxide, which are crucial for respiration and photosynthesis.
- **Temperature and Light**: These influence the climate and conditions of the ecosystem.

4. **Combining Both Components**:
- An ecosystem is a complex interaction of these biotic and abiotic components. The living organisms depend on the non-living environment for survival, and vice versa.

5. **Conclusion**:
- Therefore, the correct answer to the question "An ecosystem contains" is the third option: **green plants, animals, decomposers, and abiotic environment**. This option encompasses all the necessary components that make up a functioning ecosystem.