Answer:
Option C, Correct Behavior genetics
Step-by-step explanation:
Behaviour genetics is the study of the influence of both genes and environment on the behaviour of an individual. This study is done to understand how both genes and environment together affect the behaviour of an individual. It is believed that all forms of behaviors are either inherited or learned. Mr. Hill is noting the concordance rates of music ability for both biological children (who might have inherited this ability from their parents) and adopted children (who might have learned this ability from the musical environment around them)
Hence, option C is correct