What were ditches and canals used for? A Drainage and transportation paths
B. Building cities
C. Catching frogs and toads
D. Healing the sick

A

Explanation:

Canal's were used for drainage in ditches where used for people to move to different places easier

the language dates from the contacts of arabian traders with the inhabitants of the east coast of africa over many centuries. under arab influence, swahili originated as a lingua franca used by several closely related bantu-speaking tribal groups.

the second significant cause of the great migration was the desire of black southerners to escape segregation, known euphemistically as jim crow. rural african american southerners believed that segregation - and racism and prejudice against blacks - was significantly less intense in the north.