Why was the Yellow River important for ancient Chinese dynasties? Without the protection provided by the river, dynasties were open to invasion. Without the food grown in the river valley, dynasties could not remain in power. Without the transportation provided by the river, dynasties could not reach the sea. Without the large population in the river valley, dynasties were unable to raise armies.

On the map above, areas along the coast are colored green (letter b). what type of climate do these areas have? a. arid b. semiarid c. mediterranean d. humid subtropical

Ahistorian has discovered a letter written by an early roman emperor. she translates the letter and discovers that it contains orders to a general before a battle. she works to determine when the letter was written to figure out which battle the letter references.the historian in the passage is most clearly demonstrating which historical thinking skill? a. identifying causes and historical contextb. thinking chronologicallyc. making and evaluating arguments and interpretationsd. analyzing historical sources

The mongols were descendants of a. pastoral nomadic tribes b. tibetan tribes c. shang nobility