Which type of tissue covers body surfaces and cavities?

Epithelial tissue is the correct choice because it plays a vital role in covering body surfaces and lining cavities throughout the body. This type of tissue is characterized by closely packed cells with minimal extracellular matrix, forming protective barriers and surfaces that can be involved in absorption, secretion, and sensation. Epithelial tissue can be found on external surfaces, such as the skin, as well as internal linings, such as those found in the gastrointestinal tract, respiratory system, and blood vessels.

Nervous tissue, while essential for transmitting signals throughout the body, does not serve a covering or lining function. Connective tissue primarily serves to support, bind, and protect other tissues and organs rather than covering surfaces. Muscular tissue is involved in movement and is primarily concerned with contraction and generating force, not in covering or lining surfaces. Thus, the unique role of epithelial tissue in covering and lining is what makes it the correct response.