Step 1: The image shows catgut, a natural absorbable suture material.
Step 2: Despite the name, catgut is not made from cats; it is derived from sheep submucosa or beef (cow) serosa.
Step 3: Being a natural protein (collagen), catgut is broken down in the wound by proteolytic enzymes, that is by enzymatic degradation.
Step 4: So the true statement is that it is degraded by enzymatic degradation. It is not made of rabbit or cat submucosa, and it is certainly degraded, ruling out the other options.