In a story, what would cause a character to be considered complex?

They would have multiple problems and or moods

In a story,what would cause a character to be considered complex?

Explanation:

Hehe its tone?

self-monitoring is in other words holding back your emotions for the better good. usually, people who can't hold their excitement, temper, or any other emotions, need to self-monitor themselves.   lol

i believe that dan is so anxious because he dose not know what awaits him when he gets there. but i dont know to be honest