Answer: Diffusion
Explanation
Diffusion refers to the process that describes the movement of fluid from areas of high concentration to low concentration. Osmosis is the opposite of diffusion and refers to the movememnt of low concentrations to high.
B. The nervous system collects and responds to information about the external and internal environment.
The 4th one. Maintaining body temperature and cooling down
No I think you need to do some more research
