Of the powers granted to congress, which describes a constitutional power unique to the senate?

The senate have power to ratify treaties.

Explanation:

A treaty is a written agreement establishing obligations between two or more countries. This treaty will be signed by necessary people, normally the leaders of the countries involved. To sign or give normal consent is known to ratify.

The two-third of the senate must vote to consent a treaty before it will be ratified.

just don't strip down in public lol

the first question's answer is a.