List any two factors that could lead to speciation.

The various factors which can lead to speciation are as follows:

1. Genetic drift: Genetic drift is caused by the change in the frequencies of a particular gene and is also responsible for the growth of a particular trait within the population.

2. Through Geographical isolation method which can be done by the use of various barriers such as mountains, rivers etc. It helps in reproductive isolation and thus promoting the growth of a particular trait in an individual.