Most of the animals found on the island of madagascar are found nowhere else, indicating they evolved from ancestral populations after madagascar was isolated from other continents. the type of evidence

Biogeography  

Explanation:

             The type of evidence that Madagascar was isolated from other continents is 'Biogeography'.

            Madagascar is an isolated island which lies in the Mozambique Channel and east of Africa. Madagascar is home to many floras and faunas that are not found anywhere else in the world.

           The diversified biodiversity of Madagascar is a result of its geographic isolation from the rest of the world. Many plants and animals are not found in other places of the world and are unique to Madagascar.  

            They are believed to be evolved from their ancestral animal and plant population which may have arrived to this land after crossing the great water bodies. In this ways they are evolved into unique species of Madagascar island. This is the biogeography evidence of the unique species found only in Madagascar.

Thus the answer is ---

Biogeography  

the answer is a. or c.