Explanation:

- Muscular tissue is responsible for movement and contraction. It helps in functions like walking and maintaining posture.

- Nervous tissue is essential for transmitting signals throughout the body. It plays a crucial role in control and communication.

- Connective tissue supports, binds, and separates other tissues and organs. It includes bone, blood, and fat tissues.

- Epithelial tissue acts as a protective layer. It covers body surfaces and lines body cavities, providing a barrier against injury, microbes, and fluid loss.

- The correct answer: Option 4, Epithelial tissue