Which statement best describes the main idea of “conservation as a national duty”

About how many european immigrants were processed at the facilities on ellis island

Examine these two paintings that depict famous events from american history. the image on the left, painted in 1940, shows the signing of the u.s. constitution in 1787. the image on the right, painted in 1836, shows the american victory at the battle of yorktown in 1781.which of these paintings should be considered a secondary source?

What do you think was a drawback to this method of calculating distance