Which constitutional amendment was the focus of arguments in brown v. board of education?

The Fourteenth Amendment

Explanation:

The 14th Amendment to the U.S. Constitution became the basis for many cases, specially for the Brown v. Board of Education case whose landmark outlawed school segregation which had been so common in the U.S. so far.

Such case it determined that “separate but equal” facilities were unjust, unequal, and represented a form of discrimination that instilled a sense of inferiority to African Americans children, and thus it violated the guarantee of equal protection of the laws to all citizens, regardless of their race, stated in the 14th Amendment.

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