Which of the following is not a part of the growth relativity hypothesis?
Growth relativity refers to growth that is relative to its displaced condyles from actively relocating fossae. John C Voudouris introduced this concept to explain the possible eﬀect of functional appliances on condyle and the resulting growth. The main foundations of growth relativity hypothesis  are:

Displacement of condyle.
Nonmuscular viscoelastic tissue stretch.
Force transduction beneath the ﬁbrocartilage of the glenoid fossa and condyle add new bone formation.

Textbook of craniofacial growth, Sridhar Premkumar
Displacement of condyle
Nonmuscular viscoelastic tissue stretch
Force transduction beneath the fibrocartilage
Functional loading