The diagram on the top demonstrates temperature regulation in a cold environment. The diagram contains two parts:

1. A loop diagram: Two curved arrows are joined to form a circle. On the left side of the circle, the text reads ‘STOP’ and on the right side of the circle, the text reads ‘START’. In the middle, the text reads ‘Hypothalamus senses temperature change and sends signals that start or stop heat production.’ Above this, the text reads ‘Cold environment causes body temperature to decrease.’ At the bottom, the text reads ‘Body temperature increases.’
2. A photograph of two people playing in snow is displayed on the top left of the circle.

The diagram at the bottom demonstrates temperature regulation in warm environment. The diagram contains two parts:

1. A loop diagram: Two curved arrows are joined to form a circle. On the left side of the circle, the text reads ‘STOP’ and on the right side of the circle, the text reads ‘START’. In the middle, the text reads ‘Hypothalamus senses temperature change and sends signals that start or stop cooling mechanism.’ At the bottom, the text reads ‘Body temperature decreases.’
2. A photograph of a football player kicking a football is displayed on the top left of the circle.