Step 1 of the Anaconda plan was to completely blockade all ports that were in any way related to the southern territories. They wanted to prevent them from getting help from outsider countries such as European countries which were willing to help the Southerners at the time. By blocking all ports, they would prevent them from ever leaving the territory. This step was conducted by the Navy.
Step 2 was about cutting it off from help from the Americas. It was about a continental blockade where the southerners would be surrounded from all sides, from Northern states in the north, to northern blockades in the East and West. They would occupy and block things like railroads or similar roads and would prevent anything from getting in or going out of the territory.<span />
The answer is a because interchangeable parts made everything be a lot more easy to take apart becuase instead of everything be made of one part they had multiple parts
The walls are thought to have been a symbolic show of authority, designed to preserve the privacy of royal families and set them apart from and above commoners. It is also important to note that the walls surrounded and later adjoined huts made of daga (mud and thatch), linked with them to form a series of courtyards.
The question will be true! :D