Final answer:
The eighteenth-century colonial economy considered slavery a necessary system, prevalent in both southern and northern colonies, supporting plantation economies and contributing to the wealth and political power of the aristocracy.
Step-by-step explanation:
The practice of slavery in the colonies is best described by the first statement: Slavery was seen as a necessary economic system for the colonies.
In the eighteenth century, slavery was deeply rooted in the colonies and played a pivotal role in the economic development of regions like Virginia, Maryland, South Carolina, and Georgia. The Chesapeake and Low Country colonies relied heavily on the labor of African and African-American slaves on plantations, establishing an economic and political aristocracy based on this coerced labor force.
This arrangement provided the wealth that enabled the plantation owners to experience freedom and liberty at the expense of the enslaved individuals. Similarly, slavery was not confined to the South as it was also present in Northern colonies, such as New York and New Jersey.