A right rectangular pyramid is sliced horizontally (across) at the red line by a plane parallel to the base. What is the shape of the cross-section? vertex A base A. Cube OB. Trapezoid C. Triangle D. Rectangle

The shape of the cross-section will be a trapezoid
Here, we want to get the shape of the right rectangular pyramid sliced horizontally across the red line
What we simlpy get is the shape below the red line
Upon slicing, what we get will be a shape that looks like a trapezoid
Hence, the correct selection is a trapezoid