Avertical plane intersects the three-dimensional object in the image and divides the object into equal halves. what is the shape of the cross section?

The correct answer is "plane." A vertical plane intersects the three-dimensional object in the image and divides the object into equal halves. The shape of the cross section is a plane. If you try to look at it, only facing the front of the 3D object, the vertical cross section is just basically a line. But when transforming it into 3D, it creates a plane.