According to the textbook, abnormal behavior is defined by two core features that are indicative of the person requiring psychological . these two features area. statistically rare and maladaptive. b.loss of control and culturally relative. c.subjective discomfort and statistically rare. d.maladaptive and loss of control over thoughts and behaviors.

d.maladaptive and loss of control over thoughts and behaviors.

Explanation:

Abnormal behaviour will be defined once maladaptive and loss of control over thoughts and behaviours hinder a person from functioning.

This means that the behaviour is causing distress, usually a combination of pain and stress that makes the people conflict more than the average and leads to a "psychological disorder" in the long term:

All disorders are a form of deviation since they involve: violation of common and social normals, the personal distress also is found in statistical extremes.

Anxiety disorders will often manifest as unfounded fear, and when this fear prevents the person to carry out a normal life, then it is considered abnormal behaviour.

The same happens with dissociative or mood disorders, that make someone live with complications unprecedented, and typical abnormal behaviours are classified into forms of mental illness:

Schizophrenia and Bipolarity, are common examples of these.

sounds good to me mate!