Question

The dragon backbone pump led to an increase in _______________.

Answer 1

^

l

l

l

l

l

l

l The person adove me is wrong.

Answer:

The answer is D. all of the adove

Explanation:

I did the test >:)

Answer 2

Answer:

Food Surplus

Explanation:

The dragon backbone pump was a device used in china during the Song dynasty, to pump the water into canals to irrigate crops and to collect fresh water from wells. The unique thing about this device that even a single man could operate it. It was in use for almost 300 years. It was portable and advanced irrigation and farming became much easier by allowing one person to do the job of many. It helped to produce surplus food.