Please help!! 30 points!

Explain the reasons please and thank you

Mesopotamians used the plow to make their farmland more productive. which of the following was necessary for the use of the plow? a. the domestication of oxen b. the creation of government c. the invention of writing d. the establishment of cities

Skeleton and keyword outlines are most appropriate for what speech style? extemporaneous impromptu manuscript memorized

What was one step that charlemagne took to unite his kingdom? a. he chose a single strong heir to inherit his throne. b. he drove muslim forces out of europe. c. he created and supported schools. d. he declared himself head of the catholic church.