Final answer:
Fibroblasts are the connective tissue cells that produce collagen.
Step-by-step explanation:
Connective tissue is a diverse and widely distributed tissue type in the human body, providing structural support, connecting and protecting various tissues and organs. Connective tissue consists of cells and an extracellular matrix, which is a non-cellular component containing fibers and ground substance. Different types of connective tissue cells contribute to the formation and maintenance of connective tissue.
The correct answer is a. Fibroblast. Fibroblasts are the most abundant cells in connective tissue proper and are responsible for producing collagen, a fibrous protein that provides strength and support to tissues. Collagen fibers are thick, strong, flexible, and resist stretch.