Some students use an apple to represent the Earth. What is the best reason to use an apple for this comparison?

a. The skin of an apple is very thin, and the crust of the Earth very thin.

b. The flesh of an apple is made of the same material all the way through, and the interior of the Earth is the same all the way through.

c. The seeds of the apple are very light in comparison to the rest of the apple, and the core of the Earth is also made of very light matter.

d. The stem of the apple comes from the core and the North Pole comes from the Earth’s core.