Final answer:
The main difference between Mountain Sheep and Mountain Goats is their appearance, with goats having beards and smooth horns, while sheep have massive ridged horns and no beards.
Step-by-step explanation:
The most obvious difference between Mountain Sheep and Mountain Goats is their physical appearance. Mountain goats have a distinctive beards and long hair as well as horns that are black, shiny, and smooth. In contrast, mountain sheep typically have short hair and lack a beard, and their horns are more massive and ridged. Additionally, the behaviors and natural habitats of these animals can vary, adding to their distinctive characteristics in the ecosystem where they are found.