What is the function of lines of latitude and longitude

Plz ! after the first battle of bull run general ivan mc dowell was removed from command of the union army he was replaced by a. general ulysses s. grant. b. general george mcclellan. c. general robert e lee. d. general george meade.

Which of the following best describes the geography of oklahoma? a. extreme elevation differences b. varied ecological regions c. limited, mountainous geography d. flat rolling hills to below sea level areas

Who were the copperheads? a. a native american tribe that rose up during the war b. northern democrats opposed to the war c. ships that ran the union blockade d. an elite force of union soldiers in the west