The correct answer is option B: Nervous system.

The nervous system is the organ system that controls all other body systems and the sense organs. It is responsible for coordinating and controlling the activities of all other systems in the body and receiving, processing, and responding to information from the environment.

The nervous system is made up of two main components: the central nervous system (CNS) and the peripheral nervous system (PNS).

1. Central Nervous System (CNS):
The CNS consists of the brain and spinal cord. It is the main control center of the body. The brain receives and processes information from the sense organs and sends signals to different parts of the body to initiate appropriate responses. The spinal cord carries signals between the brain and the rest of the body.

2. Peripheral Nervous System (PNS):
The PNS consists of nerves that connect the CNS to the rest of the body. It includes sensory and motor nerves. Sensory nerves carry information from the sense organs to the CNS, allowing us to perceive and respond to the environment. Motor nerves carry signals from the CNS to the muscles and organs, enabling movement and bodily functions.

The nervous system controls all other body systems in several ways:

- Motor Control: The nervous system regulates voluntary and involuntary movements. It sends signals to muscles to initiate specific actions, such as walking or running.

- Regulation of Body Functions: The nervous system controls involuntary actions, such as heartbeat, breathing, and digestion. It ensures that these processes occur at the appropriate rate and intensity.

- Communication: The nervous system enables communication between different body systems. It allows the brain to receive information from the sense organs and send signals to other systems to coordinate appropriate responses.

- Integration: The nervous system integrates information from various sources, including the environment and the body's internal state. It processes this information and generates appropriate responses to maintain homeostasis.

In summary, the nervous system controls all other body systems and the sense organs. It coordinates and regulates bodily functions, enables movement, and allows us to perceive and respond to the environment.