Why did the ancient sumer most likely develop in mesopotamia?
a) the land is situated on a crossroads of trade.
b) highlands shelter the land from outside invasion.
c) the tigris and euphrates rivers provide fertile land for farming.
d) humans first evolved from primates in this region.

"[a]ll language is verbal, but only speech is oral." (henry hitchings, the language wars: a history of proper english.farrar, straus and giroux, 2011) oral communication is speech, conversation.verbal ability is one's skill with words, and the verbal section of the sat, the college entrance examination, tests a high school student's knowledge of written language. .

c. taught scientists many new things about the earth, but not other planets.

explanation: