The correct option is D Interspecific hybridization
Outbreeding is a breeding process were unrelated animals of the same species are mated but from different breeds. The 3 methods of outbreeding are:- Outcrossing, Crossbreeding, and Interspecific breeding.
Interspecific hybridization : Mating of the males and females of two different species is called interspecific hybridization.
Example : A mule is the offspring of a male donkey (jack) and a female horse (mare). Horses and donkeys are different species, with different numbers of chromosomes.
Outcrossing: Breeding of animals within the same breed and with no common ancestors is called outcrossing.
Intraspecific hybridization: hybrid is between males and females of the same species but belonging to different populations, breeds or cultivars.