The fact that Jeremy believes that in the U.S., the power is spread out amongst the masses and that no one group dominates another and this is good for the people and society because it gives them a political voice, means that Jeremy's views are in line with the Symbolic Interactionist View of Political & Economic Systems.
I believe the answer is: Short-term memory
Short-term memory is exist in order to give a person a certain level of capacity to actively hold a small amount of information.
This information should be used as soon as possible, because that information would most likely be vanished from our memory within a short period of time.
Agriculture can be best descried as the change from collecting berries and other edible plants to planting those plants and controlling how they grow. This can be best described with:
b. use of cultivated plants for subsistence
Irrigation is also beneficial for agriculture, but it's not absolutely necessary.