G7

1a. Agencies usually have better expertise. Congress doesn't have the knowledge that agencies do. Executing a bill takes a lot of time. Since it is time consuming, congress leaves it executing a bill to agencies.
1b. " Bureaucrats posses crucial information and expertise that make them partners with the president and congress in decision making about public policy"  P. 472

2. Oversight is when the government supervises agencies, so to make sure everything is being done correctly. With a legislative veto, congress is able to reject a proposed executive action, so to make sure anything unconstitutional does not get put into law.

3a.
EPA: clean air, clean water
FCC: television, radio, telephone
Federal Reserve Board: money
3b. The EPA develops regulatory initiatives to decrease GHG emissions. The FCC revises media regulation and processes licenses pertaining to the media. The Federal Reserve Board controls and regulates interest rates.