Earth's greatest speed of rotation occurs at the
a. equator
b. tropic of cancer
c. tropic of capricorn
d. north pole

The greatest speed of rotation is at the Equator: you can think of it like this: each point at the equator must travel the whole diameter of Earth every 24 hours. In contrast, the points around the pole don't travel as much (apart from the journey around the Sun) - so they can be said to rotate slower. 

Sequoia national park  /  inyo national forest, california, u.s. mount whitney is the tallest mountain in california, as well as the highest summit in the contiguous united states and thesierra nevada—with an elevation of 14,505 feet (4,421 m).

Answer any resource, such as wood or solar energy, that can or will be replenished naturally in the course of time;