Question

7. Horses were already in the Americas by the time explorers got there.
True or false?

Answer 1

The answer is false

Explanation: North America was the cradle of the horse's evolution, and horses existed here up until 8,000 to 12,000 years ago, when climate change and/or the arrival of humans and hunting caused the extinction of horses on the continent.

So in summary they had to bring horses back to the Americas because they were previously hunted to extinction.