List 3 positions of authority in congress and who currently holds that position. how are they chosen to that position?

One position of authority in congress is Speaker of the House. Paul Ryan is the current speaker, elected by other members of the House of Representatives. A second position is Minority Leader. Nancy Pelosi currently fills this role, and she was elected by the members of the House of Representatives. A third position is the Senate Majority Leader Mitch McConnell, elected to this position by the members of the Senate.

Ifound this on google “the existence of agglomeration economies is central to the explanation of how cities increase in size and population, which places the phenomenon on a larger scale. the concentration of economic activity in cities is one reason for their development and growth.” i hope this you for what your looking for.