Why was sea trade only carried out seasonally?
a. sailors were afraid of icebergs
b. monsoon winds were needed to power the ships
c. people had to farm, so there were not enough sailors available
d. it took time to plan the sea routes.

Sea trade was only carried out seasonally because monsoon winds were needed to power the ships.

Option B

Explanation:

During the classical age as well as post classical age, many trade routes were stabled and many of them were via sea. Sea route was very important for the traders of far flung counties as it helped the trade to flourish in that time.

But often the sea trade was carried occasionally as the traders recognised the pattern of the winds and they adapted their voyages to utilise the power of these winds as it used to help their ships move with much convenience.

B. Monsoon winds were needed to power the ships.

Explanation:

Sea trade could only be carried out seasonally because sailors across the Indian Ocean relied on the seasonal monsoon winds to carry their ships to the ports of India, Asia, and Africa.

Hope this helped!

1) d

2)c

3)b

4) a

5)c

6) c

the technology changed agriculture in an impacting manner since many people left the field work by a cellular or other technological appliances