When faced with extinction, an agency can alter its policies to affect more congressional constituencies. One example is when the shifted funding away from artists in trendy urban centers and toward community-sponsored arts in a number of districts and states.

NEA (National Endowment for the Arts)

Explanation:

 The NEA is stand for the National endowment for the arts and it is one of the type of united states agency that helps this department by offering various types of funds and this agency was developed by the United state congress in the year 1965.

 Te main objective of the National endowment of the arts is to provide the various types of opportunities in the Arts to all the American people and it also promoting the creativity.

 According to the given question, the NEA is one of the type of agency that can easily alter their policies when they are facing extinction problem and also sponsored funding too the arts community.

 Therefore, NEA (National Endowment for the Arts)  is the correct answer.