Interest groups elect politicians by contributing funds to which organizations? trade associations
mass media corporations
labor unions
political action committees

The answer is: political action committees.

Political action committees are created in order to help a certain government representative to fund all the things that support their effort in obtaining support from their target demographic. Often times, political action committees would be backed by organizations who would benefit in a certain way if the government representative secured the position.

delete this messag epls it wont let me out this exit2

i heard they are taking it off i hope this isn't true but otherwise if it doesn't get taken off it will probably be in early december or early january of 2018-2019