A moon is to be a celestial body that makes an orbit around a planet, including the eight major planets, dwarf planets, and minor planets. ... Other than the four Galilean moons, Saturn's Titan and Neptune's Triton are two other moons which are comparable in size to the Earth's Moon.
D) because those birds are scavengers and therefore there will be competition in finding food and then to fight off the other birds so that you can get the food first.
