1. Why is 250 million years called a cosmic year? A: That's the amount of time it takes the solar system to revolve around the Milky way core.

B: That's the amount of time it takes the solar system to rotate on its axis.

C: That's the amount of time it takes the Milky Way to rotate on its axis.

D: That's the amount of time it takes the Milky Way to revolve around the Universe core.

B

I'm sorry to hear that. i will try to answer your other questions if it is within my ability. : )answers: my favourite colour is black.my favourite food is pasta.my favourite school subject is english, but i do also like lunch time.my least favourite subject is history as well as geography. i have currently garnered a quite equal hatred for both of the subjects.what about you? well, you for the points. : )

They formed the oceans.  as they melted water was formed and the water made the oceans