Question

what geographical feature contributed the most to the development of cities in the united states between 1850 and 1870? census map of the united states, 1850 a natural harbors b trees c mountains d rivers city population 10,000 up to 250,000 250,000 up to 1 million over 1 million states as of census day

Explanation:

Natural harbors are deep, sheltered water bodies that allow ships to dock safely. In the 19th century, they were crucial for trade, immigration, and industrial growth. The map shows dense city populations along the eastern coast, which has many natural harbors. Trees, mountains, and rivers don't have the same direct impact on urban development as harbors did during that era.

Answer:

A. natural harbors