Which of the following powers is specific to the US Senate?

The power specific to the US Senate is the authority to approve presidential nominations and treaties. This role is outlined in the Constitution, which grants the Senate the exclusive responsibility of confirming presidential appointments, such as federal judges, cabinet members, and ambassadors. Additionally, the Senate has the unique power to ratify treaties with foreign nations, requiring a two-thirds majority for approval.

The process of providing advice and consent on these important matters underscores the Senate's critical role in balancing the powers of the presidency and ensuring that significant governmental appointments and international agreements have legislative support. This responsibility is distinct from other powers that may be held by both chambers of Congress or are assigned solely to the House of Representatives.