Roosevelt was born and raised in new york city. describe the new york city of his youth.

New York City at that time begin with the making of the city as the capital of the United States under the Congress of the Confederation from January 11, 1785, to Autumn 1788, and under the United States Constitution from its statement in 1789 until to Philadelphia. The city grew as an economic center with the opening of the Erie Canal in 1825; the growth of its railroads added to its dominance. Tammany Hall began to grow in influence with the support of many Irish immigrants, culminating in the election of the first Tammany mayor, Fernando Wood, in 1854. 

a. because the u.s. was the leading with the most technology, economy, etc. also was teamed with other allies witch boosted the economy and materials to improve technology and use it.

macon. i believe thats the answer

sorry if im wrong.