What continent did horses come from?

North America

Explanation:

Millions of millions of years ago, horses lived on North America. They dispersed due to ice bridges, such as the Bering Strait, and spread to Asia and Europe, hence why you see prominent civilizations such as the Mongol use horses.They became extinct and Europeans then proceeded to reintroduce them back to the continent.

b. major john c. frémont led a rebellion called the bear flag revolt.

explanation:

during the bear flag revolt, from june to july 1846, a small group of american settlers in california rebelled against the mexican government and proclaimed california an independent republic. the republic was short-lived because soon after the bear flag was raised, the u.s. military began occupying california, which went on to join the union in 1850. the bear flag became the official state flag in 1911.