The temperature in the body is controlled by the negative feedback. In the negative feedback regulation, the increase in a factor send the signals to reduce the effect. in the temperature regulation, the increase in the temperature causes the hypothalamus to release the signals, which lead to the decrease in the temperature.
Answer: Diffusion occurs due to the random movement of particles. It usually happens due to a concentration gradient, meaning that molecules move from an area of high concentration to an area of lower concentration.