Final answer:
Blood can be classified as specialized connective tissue because it is a fluid connective tissue that does not contain collagen fibers.
Step-by-step explanation:
The specialized connective tissue among the options given is blood. Blood is a type of fluid connective tissue that consists of various specialized cells suspended in a watery fluid containing salts, nutrients, and dissolved proteins. It does not contain collagen fibers, which differentiates it from other types of connective tissue.