This isn't really a question is it?
Cube
A cube.
Square pyramid
An octohedron
A square-based pyramid
Yes ... and the question is ...
A quadrilateral pyramid.
The solid figure that has the same number of faces and vertices and has 8 edges is a cube. A cube has 6 faces, 8 vertices, and 12 edges, so it fits the description given.
2 solid shapes together have 8 faces, 12 edges 8 vertices
square pyrimad
cube
none