Final answer:
Combining an s orbital with three p orbitals through hybridization forms sp³ hybridization.
Step-by-step explanation:
When an s orbital combines with three p orbitals through hybridization, it forms sp³ hybridization. In this process, four equal hybrid orbitals, called sp³ orbitals, are formed. These orbitals have a tetrahedral arrangement and contain one-fourth s character and three-fourths p character.