Hi there!
Generally you need to cite for everything you use as a resource except for common knowledge.
To form a more perfect union
establish justice
ensure domestic tranquility
secure the blessings of liberty to ourselves and our posterity
provide for the common defense
promote the general welfare
Answer:trading with outside partners to bring in surplus food.
building projects ensured their power would not be challenged.
the building of a postal system to increase the economy.
irrigation systems made trade possible because of surplus crops.
Explanation:
