Describe dwarf planets and their orbits in the solar system

 A "dwarf planet" is a smaller celestial body that is in orbit around the Sun, and It is not a satellite. It has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a nearly round shape. It  has not cleared the area around its orbit since, and it has always stayed there.  Three objects in our solar system have been classified as dwarf planets: Pluto, Ceres and Eris.

The answer would be sand and gravel

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.