Two closely related species of toads (genus Bufo) live in large, clearly separate geographic areas of South-East Europe. A third species similar to them lives in the narrow zone between. This third species is likely to be an example of .

hybrid species

Explanation:

Many animals migrate and grow in different places. As a result, they began to share habitats and, in certain cases, to mate. Hybridization is a symptom and a sign that species move according to their habitat needs. This phenomenon is a powerful generator of diversity in animals, plants and living organisms.

the answer is d.index

not  

cuba  

russia  

iraq  

el salvador  

explanation:

known as the land of volcanoes, el salvador has visit seismic tremors and volcanic movement. it is the main nation in central america that does not have a coastline on the caribbean sea. about portion of all salvadorans live in the wide open. they are poor and don't have power or running water in their homes. in 1525, pedro de alvarado, a lieutenant of cortés's, vanquished el salvador. el salvador, with alternate nations of central america, pronounced its freedom from spain on sept. 15, 1821, and was a piece of a league of central american states until the point when that association broke up in 1838.