MICROANATOMY

Detailed explanation-1: -Connective tissue is the most abundant and diverse type of animal tissue. Animal tissue divides into four basic groups, which include epithelial tissue, muscle tissue, nervous tissue, and connective tissue.

Detailed explanation-2: -However, the most common fiber in connective tissue is collagen. The collagen fiber is the most common type of fiber since collagen is the most abundant protein molecule in the body and is mainly involved in structure and strength. The answer is collagen fiber.