I think that you can say D.
Hope that this helps you =)
Worlds first man made states
A any type of burning increases carbon dioxide
<span>Scientists choose where are units of time began and ended based on major changes in life forms at certain times</span>
Wind erosion is the main cause. And since it is the desert that wind can pick up tiny sand rock particles that slowly grind against the rock. Over time the erosion will give a jagged rock the smooth features as if it had been submerged in a river for the roughly same period of time.
