The process of mating between closely related individuals is
A.Self breeding – fusion of male and female gametes of same plants.
B.Inbreeding – crossing of two parents of same varities.
C.Hybridisation – Crossing two parents of different species or genera is called Hybridisation.
D.Heterosis – Superior of the progeny over parents in all aspects is called Heterosis.
So, the correct option is ‘Inbreeding’.