The diagrams represent some of the systems that make up the body. a similarity between these systems is that they all 1. are made of cells that are identical in structure and function 2. contains organs that work independently from other organs in that system 3. work together to maintain a stable internal environment. 4. are separate and do not interact with other body systems.

I'm thinking it's the third option

The correct answer would be option 3.

The given figure includes various systems like the muscular system, nervous system, circulatory system, and digestive system.

These systems are involved in performing various life processes and thus, help together to maintain a stable internal environment in order to sustain life.

For example, the digestive system provides nutrition to all the cells of the body, circulatory system helps in circulating the nutrients and oxygen to all body parts, and nervous system helps in controlling and coordinating the function of other body systems.