Why was the Fourteenth Amendment necessary if the Declaration of Independence stated that all men were created equal?

It was necessary because it bound or holds the states from denying any person the equal protection of the law and also It defined all people born or naturalized within the United States except Native Americans as citizens.

Explanation:

The main provisions for the 14th amendment is for equality among the people.The 14th Amendment in the constitution of the U.S. was said to be formed in 1868. The amendment brought about the permission of citizenship to all individuals born or or has United States has their country by naturalization. it gave right to all citizens as having equal protection of the laws.

One of three amendments that was enacted or passed during the Reconstruction era was to stop slavery and to give black American civil and legal rights. It was worked a little bit but not completely.

you answered your own : -/

d - failures.

the only attempted british colony in north america before 1600 was roanoke, virginia, which was a total failure. england claimed several areas, including newfoundland, but made no sustainable attempts to colonize them before 1600.