Respuesta :
Answer:
Geographical isolation
Explanation:
Geographical isolation may be defined as the separation of species due to the geographical barrier. This isolation prevents the species to reproduce from the original population and leads to speciation.
The founding population of lizard has arrived on an island. The lizard is geographically isolated from the main population. Hence, geographical isolation is responsible for the formation of new lizard species.
Thus, the correct answer is option 2.
