How did farmers shape their land to better grow crops in medieval Arabia? A). They developed terraces
B). They built irrigation channels
C). They worked sheep and camels
D). They crafted tools and machinery

b. andrew

zheng he was a chinese explorer who lead seven great voyages on behalf of the chinese emperor. his seven total voyages were diplomatic, military, and trading ventures, and lasted from 1405 – 1433. however, most historians agree their main purpose was to promote the glory of ming dynasty china.

explanation:

the roman empire began to fall