D. <span>Cretaceous
</span>Angiosperms<span> evolved during the late </span>Cretaceous<span> Period, about 125-100 million years ago.</span>
Answer: The plants that form coal grow during the summer months when the weather is warm.
Well the answer is tropics are hot . when its hot , hot air rises . The poles are cold. when its cold, the air sinks.The <span> Coriolis effect of the earth's rotation, perhaps that the air rising between the tropics would move to the poles before sinking but since it spins to the right in the northern hemisphere ,and to the left in the southern, it forms those two belts of high pressures at roughly the latitudes 30 N and 30 S as described in the image from Venkata, here above. Which in this case it forms the Hadley cell. </span>
