All of the following are possible causes for a mood disorder except factors.
a.
biological
b.
psychological
c.
environmental
d.
religious

D.) Religious

A and B are common mood disorder causes and environmental can be very true because some people just might not like the environment they are in.

The correct answer for the blank is -

D. Religious.

Explanation:

Mood disorder can be described as psychological disorder or a mental illness /state of a person that is mainly characterized by the increase or decrease in the mood of person with respect to the circumstances around him.

In other words, the emotional state of a person gets distorted and person becomes unable to work properly. There can be various reasons, which may include biological factors, phychological or environmental factors. It has no religious cause, as religious factors does not alter the emotional state of any person.

Example - depression or bipolar disorder.

Thus, option D) is the right answer.

the most logical answer would be a

b is the correct answer