Answer:
They study the role of heredity in behaviour and mental processes such as psychological disorders, criminal behaviour and thinking.
Step-by-step explanation:
A psychologists studies the mind of individuals with respect to their emotions, reactions to situations, mental illness, etc: On the basis of their study they conclude about the nature and reaction in near future of their clients.
When we talk about biologically oriented psychologists, it naturally comes to the note that these psychologists will somewhere connect everything with the hormonal behaviour, or that naturally comes to an individual from their parents that is in heredity.
They consider the natural human behaviour more dependant upon their heredity and hormones, as that is all biological.