Gyri form the top of the ridges, while sulci form the " valley" of the ridges.
First we have to know what an "internal stimulus" is. An "internal stimulus" is something INSIDE of us, that makes us want to do something. Hunger is an example of an internal stimulus. It comes from within us. And it makes us want to eat. So, since hunger is the stimulus, an appropriate response would be to eat some food. Does that make sense?
"The manner in which the body changes as a natural result of growing older" is called Aging Process. <span>The human body goes through an assortment of changes as it gets older. Muscles, blood vessels and other tissues lose their elasticity. The heart becomes less efficient, bones become weaker and the metabolism slows down.</span>
A Fault or B is the correct answer, faults are when Earth's crust is ruptured or cracken deep below the surface in the crust.
