How are galaxies important to our existence?
A. Without galaxies, there could not have been a Big Bang.
B. Without galaxies, the universe could not be expanding.
C. Deep in their centers, galaxies created the elements from which we are made.
D. Galaxies recycle material from one generation of stars to the next, and without this recycling we could not exist.
Answer:D
How are galaxies important to our existence?
A. Without galaxies, there could not have been a Big Bang. B. Without galaxies, the universe could not be expanding. C. Deep in their centers, galaxies created the elements from which we are made. D. Galaxies recycle material from one generation of stars to the next, and without this recycling we could not exist.