2. The hot metal objects in the photo cool quickly and soon stop glowing. What happens to the
energy as the metal parts cool?

All but one describes an effect of aging on the digestive system. a) decreased acid secretion b) decreased elasticity of stomach c) capacity to resist damage decreases d) food remains in stomach for less time

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

In the practice of science, this type of reasoning is used to develop explanations.