Answer:
The correct answer is E. Sympatric speciation
Explanation:
In sympatric speciation, two population of the same species which live in the same habitat becomes isolated reproductively and divide into a different species. The speciation mainly occurs due to the presence of polyploidy in some individuals in the organism.
This case is mainly seen in plants where some plants become polyploid and they can only produce offspring when the fusion of gametes and eggs of two polyploid individuals takes place. Therefore the correct answer is E.