The environmental movement in the united states can be traced as far back as 1739 with the efforts of benjamin franklin and other philadelphia true or false

True!  I am not sure what environmental movement though.

It is the doctrine that the us had the right and duty to expand throughout north america. it just means they believed they had the right to expand westward and they did! they stated with the 13 colonies and then they kept moving gaining different territories throughout the years

Answer// dinosaurs emerged during mesozoic era;