Food webs with fewer species are more sensitive to the loss of species and ecosystem disturbances
D is the correct answer :).
The four inner planets have slower orbits, slower spin, no rings, and they are made of rock and metal. The four outer planets have faster orbits and spins, a composition of gases and liquids, numerous moons, and rings. The outer planets are made of hydrogen and helium, so they are called gas giants.
The answer is A because it is not formed from decaying marine animals.