Another key u. s. federal agency is which is responsible for coordinating, directing, and performing highly specialized activities to protect u. s. information systems and produce foreign intelligence information

The correct answer that fills the blank is:

- Another key U.S. federal agency is the National Security Agency (NSA), which is responsible for coordinating, directing, and performing highly specialized activities to protect U.S. information systems and produce foreign intelligence information.

Explanation:

The National Security Agency was created below the presidency of Harry Truman in 1952 and is in charge of information security in the US but also obtaining relevant information about the country and strangers. In the last years has been very criticized due to the intercepting of communications from all world revealed by Edward Snowden in 2013.