The correct answer is:
OA. control
Explanation:
1. The nervous system is responsible for controlling and coordinating all the activities of the body.
2. It receives information from the sensory organs, processes this information, and sends out signals to various parts of the body to carry out appropriate responses.
3. By acting as the control system, the nervous system ensures that different body functions work together harmoniously and respond effectively to changes in the internal and external environment.
Therefore, the nervous system serves as the major control system of the body, regulating and coordinating its functions.
