Which of the following illustrates a foreign policy duty of congress?

negotiating a peace treaty with a rival nation
declaring war on an enemy nation
sending an operative to gather information about an enemy nation
appointing an ambassador to improve relationships with rival nations

Out of all choices, "declaring war on an enemy nation " illustrates a foreign policy duty of Congress.

Option B

Explanation:

The branch of legislative consists of the House of Representatives and the Senate, jointly referred to as Congress. The legislator adopts, among others, all laws, declares war, regulates international and foreign trade and controls tax and expenditure policy. They share with the president, who is usually responsible.

The US Constitution gives Congress all powers to shape foreign policy, although Congressional activism and foreign policy influence have changed over time. Lawmakers rarely communicate directly with other countries about politics, but laws implemented by Congress or treaties and deadlines accepted by the Senate can affect US interactions with other countries.

Foreign policy has led to tensions over the years between the Capitol Hill and the White House, especially regarding sanctions and foreign assistance, trade and human rights. To ensure powers separation, the US federal government consists of three components: legislative, judicial, and executive.