How did the Cuban Missile Crisis of 1962 come to an end?

Soviet Premier Nikita Khrushchev orders withdrawal of missiles from Cuba, ending the Cuban Missile Crisis.

Explanation:

nothing certain is known about what happened, but it seems that the country declined gradually, perhaps due to bad government, or, more likely, due to a series of bad harvests, which resulted in widespread and recurrent famine.

the answer to your question is a. the salt plains

in 1811, he led an expedition, known as the george c. sibley expedition, to improve relations with the pawnee and kansa tribes, and also to locate the rumored jefferson's salt mountain