Takhi and domesticated horses share many traits, but there are some are unique to takhi. For example, takhi are smaller and have thicker fur than domestic horses. Which statement identifies the main cause of takhi tending to be smaller and have thicker coats than domestic horses?
1) Takhi are native to an area with cold, dry grasslands.
2) Takhi were exposed to many different environments over time.
3) All takhi change which genes they choose to express in an environment.
4) All takhi developed from a single individual that has those traits.
