How much time taken to form climax community in grassland and forest.

Explanation

To determine the time taken to form a climax community in grassland and forest ecosystems, we can break down the information into clear steps:

### Step-by-Step Solution:

1. **Understanding Climax Community**:
- A climax community is the final and stable community that develops during ecological succession. It represents the endpoint of the succession process.

2. **Types of Ecosystems**:
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