What is ecological pyramid ? Draw the pyramid of numbers.

Explanation

### Step-by-Step Solution:

1. **Definition of Ecological Pyramid**:
- An ecological pyramid is a graphical representation that shows the relationship between different organisms in an ecosystem. It can illustrate the number of organisms, biomass, or energy present at each trophic level.

2. **Types of Ecological Pyramids**:
- There are three main types of ecological pyramids:
- **Pyramid of Numbers**: Represents the number of individual organisms at each trophic level.
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