Amajor development that occurred during the hellenistic era was

The spread of Greek culture throughout most of the ancient world

Although Alexander the Great's kingdom did not last for long, his influence did. This is because the Greek were able to spread their culture throughout Europe and Asia. The Greek culture mixed with other civilization to for the Hellenistic culture that spread around Europe

b) brahmans   is nomadic society

the answer is selfishly. hope this !