Final answer:
The appropriate executive department to contact for federal funds to help the homeless find housing is the Department of Housing and Urban Development (HUD), which manages housing assistance programs.
Step-by-step explanation:
If a citizen is concerned about helping the homeless in her community find decent places to live and is seeking federal funds to support her ideas and programs, the appropriate executive department to contact would be the Department of Housing and Urban Development (HUD). HUD is responsible for national policies and programs that address America's housing needs, improve and develop the nation's communities, and enforce fair housing laws. The department provides an array of financial assistance through income security programs, including subsidized housing, which aims to make housing more affordable and to aid the homeless population.