What 1 and 2 and 1 and 11

Which revelation resulted from the observation of the spectrum of different galaxies? a. there were more galaxies whose spectrum was blueshifted b. there were no galaxies whose spectrum was redshifted c. there were more galaxies whose spectrum was redshifted d. there were no galaxies whose spectrum was blueshifted

Both pictures below were taken at the same time of day, but one picture was taken in summer, and the other in winter. how can you tell which is in winter

Canada must balance the economic opportunities offered by its natural resources with the need to maintain links to the united states maintain high tariffs preserve the environment protect its borders