Answer:
the power to declare war
Explanation:
Enumerated Power refers to a list of power that is explicitly written within the United States' Constitution. The Untied States was operated specifically based on this enumerated power before the creation of the first 10 amendments of US constitution in 1791,
The power of Congress to declare war to another nation is explicitly written under the Article I, Section 8, Clause 11 of the Untied States constitution:
. . .The Congress shall have power . . . To declare War, grant Letters of Marque and Reprisal, and make Rules concerning Captures on Land and Water . . .
