Answer:
The first horses lived 4 million years ago in North America. From there, they crossed a
L(l)and bridge into Asia and Europe. The horses in Europe and Asia continued to thrive,(no comma necesary)
but the horses in North America went extinct. No one is quiet(quite) sure why they died out
(,)but scientists think it might be because of climate change or overhunting by early
humans.
Step-by-step explanation:
Sorry I couldn't do more right now.... Bold means that the word or character before needs to be replaced, and italics are just explaining... I hope this helps a bit :)