The correct option is A Connective tissues
Connective tissue is the most abundant type of tissue in the animal body. It is the tissue that connects, binds, supports and separates other tissues or organs. In the abdominal wall, most organs are suspended from the abdominal wall with the help of connective tissue. Adipose tissue is also a form of connective tissue. Other examples include bones, ligaments, muscles, and mainly blood. So it is the most abundant tissue in animals.