Write down the definitions of these words, please Radiation
Isolation
Fossils
Galapagos

Explanation:

Radiation:   In physics, radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium.

Isolation:   the process or fact of isolating or being isolated.

Fossils:  Fossils are the preserved remains, or traces of remains, of ancient organisms. Fossils are not the remains of the organism itself! They are rocks.    

Galapagos: an archipelago on the equator in the Pacific, about 600 miles (965 km) W of and belonging to Ecuador: many unique species of animal life.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.