Without our unique atmosphere, the earth might be lifeless warmer closer to the sun more similar to mars bombarded by meteorites

Ithink it’s true as the answer.

Cause of he different elevations  hope this ?

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).