Answer:
The correct answer is option conjugation.
Step-by-step explanation:s
Horizontal gene transfer is also called lateral gene transfer. It involves transfers of genetic material of an organism in to another organism that is not its progeny.
This process is characteristic feature of bacteria and archaea. Gene transfer is takes place in three ways transduction, transformation and conjugation. Conjugation is the the type of horizontal which occurs naturally especially in between donor and recipients.
Thus, the correct answer is option Conjugation.