List three main factors responsible for the speciation and briefly describe each one of them.

(N/A) $1$. Genetic Drift: This refers to the random change in the frequency of alleles in a population over generations,which can lead to significant changes in small populations.
$2$. Natural Selection: This is the process where individuals with favorable traits are better adapted to their environment,survive,and reproduce,passing these traits to the next generation.
$3$. Reproductive Isolation: This occurs when populations of the same species become geographically or behaviorally separated,preventing them from interbreeding and eventually leading to the formation of new species.