Mood disorders in which the disturbance lies in only one direction are considered

The answer is a unipolar disorder.

Major depression also called unipolar or major depressive disorder, it is featured by a constant feeling of sadness or a lack of interest in the outside world. The unipolar signifies a distinction between the major depression and the bipolar depression that signifies towards an oscillating state between mania and depression.

answer; the above statement is (true);

21 stacks

step-by-step explanation:

divide 630/30

21 stacks

enjoy!