The invention of agriculture
a. led to an increased birth rate and death rate.
b. provided a more dependable food supply.
c. allowed people to settle down in villages.
d. all of the above

The right answer is actually D) all of the above, they allowed people to settle in villages because you had to farm a lot if you wanted to keep up agriculture, much better food supply and finally sense there is more food then there is more birth rate, and less death.

The diaphragm is what i think ur talking about