Question

what factors could lead to the rise of new species

Answer 1

The factors are :
Genetic drift- the change in the frequency of gene in a population without providing survival advantage

Natural selection- the change in gene of a population which provides survival advantage

Geographical isolation-the separation of two groups due to physical barriers

Reproductive isolation-geographic leads to no exchange of genes between two groups and they became incapable of reproducing with each other.....

Answer 2

genetic drift
natural selection
physical factors
mutations