The impact it has is global warming
Cross sections perpendicular to the base and through the vertex will be triangles. Below, you can see a plane cutting through the pyramid, part of the pyramid removed, and the cross section. You could also take a slice parallel to the base. Cross sections parallel to the base will be hexagons.
Definently A because you can rule all the others out if you look at map
I believe that your weight will remain the same or increase because your weight is pushing down from the gravity!