The boundary where the crust is neither created nor destroyed is called a transform boundary.

Here's why:

* Transform boundaries are where two tectonic plates slide past each other horizontally.

* No new crust is formed (like at divergent boundaries) and no existing crust is destroyed (like at convergent boundaries).

* The primary activity at transform boundaries is earthquakes, caused by the friction and stress of the plates grinding against each other.

Examples of transform boundaries:

* The San Andreas Fault in California, USA

* The Alpine Fault in New Zealand

* The Queen Charlotte Fault in Canada

Let me know if you have any more questions!