skin
horses are mostly found in grasslands
A swan is mostly covered with feathers.
The surface of earth is covered mostly by water.
Probably mostly because horses today are used mostly for riding, not for breeding.
Horses are mostly used for work or for competitions.
Today, people in America ride horses mostly for pleasure.
In 1989' a Nation that is mostly covered in dense forest?
mostly oats
Grass
Mostly gated horses or trotting horses like the Tennessee Walking Horse or Saddlebred.
Lemurs are covered with fur.
Earth. Over 70% of Earth's surface is covered by water.