Sally's stomach begins to rumble, reminding her that she skipped breakfast this morning. this hunger signal is sent to the brain, which is part of the nervous system.

Answer;

Central Nervous system

Explanation;

-The body is in a continual state of hunger, which is intermittently relieved by eating.

-The central nervous system (CNS) controls most functions of the body and mind. It consists of two parts: the brain and the spinal cord. The brain is the center of our thoughts, the interpreter of our external environment, and the origin of control over body movement.

-The part of the brain which controls hunger is the Hypothalamus. It is the Main regulatory organ for apetite. It is a section of the brain which is responsible for hormone production. The hormones produced by this area of the brain governs body temperature, thirst, hunger, sleep, mood.

      n

1. is geographic distribution

2 is increasing complexity

3 is transitional forms