I think B is the answer The Clean Air Act That prevented air pollution and protected the ozone layer as well as promote public health. This act gave Enviromen. Protection Agency the power to take effective action fighting environmental air pollution
With parents you are not alone and with people you love and chances are have free room and board. However privacy and independence may become contraindicative.
Living alone you can kiss goodbye to room and board, however you have a personal and free life.
Living with a room is the half and half, you are somewhat free and private and you don't go it alone while paying room and board.
The two types would be thermal energy and light radiation, which is usually present in most ecosystems since the sun gives off both of them.
