Comprehensive and Detailed Explanation From Exact Extract:

A bollard is a sturdy physical barrier—often a steel or concrete post—designed to prevent vehicles or unauthorized individuals from ramming into or entering secure areas of a building. It provides physical security and is commonly used outside entrances to prevent forced entry.

A. PIV (Personal Identity Verification) cards are used for identity access control, not physical blocking.

B. Motion lighting may deter activity but doesn’t physically prevent entry.

C. Surveillance records activity but cannot stop a forced entry.