The Ice Ages shaped and sculpted the face of the Earth. Continents that were once connected by land bridges had shifted and separated during the Ice Ages. Therefore without the Ice Ages, Earth would look significantly different, and some of the natural beauties like Niagra Falls would not exist.
I believe that the answer is C
Humans interact with the environment on a daily basis in Maryland in many ways. Some common ways that humans interact with the environment in Maryland are farming, fishing, environmentalism work, hiking, biking, and also even flipping the switch of their electricity. To produce the electricity the energy must be produced through some interaction with the environment such as the burning of fossil fuels, solar energy, or wind energy.