The president can quickly direct the agencies of the exclusive branch to respond to economic ,social, or political needs by

The president can quickly direct the agencies of the exclusive branch to respond to economic, social, or political needs by  signing executive orders.

Explanation:

Executive orders are decrees signed by the President of the United States, which serve to immediately legislate issues that have been granted to the presidential powers set forth in Article II of the United States Constitution. Even the President can issue executive orders on issues not authorized by the Constitution, in which case they must be approved by Congress. In all cases and like federal laws, its content can be reviewed by the Supreme Court.

Their usefulness is explained by the immediacy with which said executive orders come into force, since they do not need prior congressional debate. Therefore, many times, for reasons of necessity and practicality, presidents dictate this type of legislation.