Final answer:
The gastrointestinal option is NOT one of the four major tissue categories: nervous tissue, epithelial tissue, connective tissue, and muscle tissue.
Step-by-step explanation:
The gastrointestinal option is NOT one of the four major tissue categories.
The four main types of tissue are nervous tissue, epithelial tissue, connective tissue, and muscle tissue. The gastrointestinal system is a part of the body's organ systems, not one of the tissue categories.