Is the exoskeleton of a crab living or nonliving?

The exoskeleton of a crab is nonliving. The exoskeleton is essentially a hard outer shell that protects the crab's soft tissue and organs, and serves as a supportive structure for the crab's body. While the crab is alive and grows, it periodically sheds its exoskeleton and creates a new one. However, the exoskeleton itself is not alive, as it is made up of a tough, lifeless substance called chitin.