Which bone or pair of bones forms the superior portion of the cranium?

The left and right Parietal bones. There are eight major bones that form the cranium. They are: Ethmoid: Forms the lower eye orbits and ceiling of the nasal cavity. Frontal: Forms the front of the cranium which includes the forehead, brow ridges, and nasal cavity. Occipital: Forms the lower rear of the cranium. Parietal (left and right): Form the superior and lateral portion of the cranium. Sphenoid: Forms some of the eye orbits and the floor of the cranium. Temporal (left and right): Forms the sides of the cranium and the external ear.

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass

A) early horses is your answer