Answer:
protagonist and antagonist
Explanation:
The two main characters that should be present in a story are the protagonist and antagonist.
The protagonist one of the main characters. The protagonist is the person leading a contest, a principal performer in the story. He/She is an advocate or champion during the course of action.
An antagonist is the other character in the story. An antagonist usually opposes the protagonist in a literary work or drama. He/she is an enemy or opponent who antagonizes or stirs.
Answer:
Mental disorder
Also called: mental illness
A wide range of conditions that affect mood, thinking and behaviour.
MOST COMMON TYPES
Clinical depression
A mental health disorder characterised by persistently depressed mood or loss of interest in activities, causing significant impairment in daily life.
Anxiety disorder
A mental health disorder characterised by feelings of worry, anxiety or fear that are strong enough to interfere with one's daily activities.
Bipolar disorder
A disorder associated with episodes of mood swings ranging from depressive lows to manic highs.