<span>The answer to the question is atmosphere. The atmosphere is the spherical layer of Earth that contains a mixture of gases that are necessary for life on Earth. The atmosphere helps insulate the Earth's temperature as well as getting out some of the harmful things from outer space like filtering out harmful UV radiation from the Sun and burning up meteorites.</span>
ok so if the bird is on the top at 15 and a half then goes down six feet substrate 15 and a half from six and you get nine and half from the ground to the bird
