Asteroids vary greatly in size and are mostly made up of frozen water and gas. This one is true.
They are said to be "mostly formed of ice and gas" as they rarely can be found consisting of stone, nickel and iron. These are extremely dangerous in our Universe.
They construct dams and create an ecosystem for other species . Because of their dam building nests become available for birds, fish population increases and waterfowl population goes up
I believe they are the quadecipes because they are under the knee and the thigh is under the knee
C. since sexual reproduction takes a lot longer and it involves 2 offsprings. it requires more energy
