Final answer:
The nervous system is the system that responds to environmental stimuli by receiving information from the environment, processing it, and initiating a response.
Step-by-step explanation:
The nervous system is the system that responds to environmental stimuli. It is responsible for receiving information from the environment, processing that information, and initiating a response. For example, if you touch a hot stove, your nervous system will quickly send a signal to your muscles to move your hand away from the stove to prevent injury.
The endocrine system, on the other hand, regulates various processes in the body by releasing hormones. While it does play a role in maintaining homeostasis, it does not have the same immediate response to environmental stimuli as the nervous system. The lymphatic and immune systems are primarily involved in protecting the body from pathogens and maintaining immune health, but they do not directly respond to environmental stimuli like the nervous system.