How do you distinguish between dorsal and ventral surface of the body of earthworm ?

Explanation

To distinguish between the dorsal and ventral surfaces of the body of an earthworm, follow these steps:

### Step-by-Step Solution:

1. **Identify the Orientation**:
- The earthworm has a distinct orientation. The dorsal surface is the upper side, while the ventral surface is the lower side that is in contact with the ground.

2. **Observe the Color**:
...