Answer:
Transform boundary.
Explanation:
There are three types of plate boundaries, convergent, divergent, and transform.
The divergent boundary occurs when two tectonic plates move away from each other.
The convergent boundary happens when two plates slide toward each other to form a subduction zone or a continental collision.
Finally, the transform boundary, that the San Andreas fault in California is an example of it, is when two plates move away from each other either to the left (sinistral) or to the right (dextral). The motion is predominantly horizontal. Strong earthquakes can occur along the faults produced by this type of plate.
I hope this answer helps you.
