What advantages are there to mammals in possessing a flexible connection between the pectoral girdle and vertebral column?

Explanation

### Step-by-Step Solution:

1. **Understanding the Anatomy**:
- The pectoral girdle is the structure that connects the forelimbs (arms) to the vertebral column (spine). It consists of bones such as the clavicle (collarbone) and scapula (shoulder blade).

2. **Flexibility of the Connection**:
- The connection between the pectoral girdle and the vertebral column is flexible, allowing for a range of movements. This flexibility is crucial for various activities.

...