Final answer:
Connective tissue is characterized by a plentiful extracellular matrix that provides support and structure to the body.
Step-by-step explanation:
The tissue characterized by a plentiful extracellular matrix is connective tissue. This matrix separates the cells and is the most abundant feature in connective tissue, composed of non-living material that provides structural and supportive roles within the body. It differs from other tissue types like epithelial tissue, which consists of tightly packed cells that line surfaces and cavities, muscle tissue made up of contractile cells for movement, and nervous tissue which transmits electrochemical signals.