Maps play an important Roll in the past and present. I believe that the future of maps will not be as exciting and intriguing at the past of maps. As long as we keep the memory of maps in the future, we can predict that they will still help us.
I would say it will defitley be either B or D, what have you been reading about or doing before this? If you were reading about how healthy they are it would be D, but if you were reading how they are being destroyed it would be B
The answer is - wavelength.
As the wave approaches the shore and it reaches shallow waters it's characteristics start to change. When the wavelength is half of the water depth than the bottom of the wave starts to drag on the ocean floor. As it starts to do this the wave starts to slow down at it bottom as it approaches the beach but the upper part of the wave maintains its initial speed. Because of this the wave becomes longer. Once it reaches the shore it crashes on it and falls apart.