Final answer:
The Mail Fraud Act of 1990 is the legislation that bans fraudulent practices using wire, radio, and television transmissions. The Federal Communications Commission is responsible for enforcing regulations to prevent fraud and protect the public in communications and advertising.
Step-by-step explanation:
The act that bans the use of wire, radio, and television transmissions to defraud the public is the Mail Fraud Act of 1990. This act is part of a series of legal measures taken to protect the public against fraudulent practices in various forms of communication and advertising.
The Federal Communications Commission (FCC) plays a pivotal role in regulating interstate and international communications by radio, television, wire, satellite, and cable, alongside enforcing laws against fraudulent advertising and overseeing matters of public safety and national defense. The Telecommunications Act of 1996 further expanded the FCC's role with changes in the media industry, but the core mission to monitor and prevent deceitful practices remains a cornerstone of the FCC's mandate, in cooperation with other federal agencies.