Concept:A tragic hero is a central character whose personal flaws combine with external forces to bring about his downfall.
Explanation:The description refers to a major character who suffers a downfall.
This downfall is caused by two combined factors: his own weaknesses and circumstances beyond his control.
His personal flaws, such as pride or bad judgement, make him vulnerable.
External forces, such as fate, society, or the actions of others, push him toward destruction.
In literature, this type of character is called a tragic hero.
A flat character is shallow and lacks depth, not one who falls from greatness.
A round character is complex and well-developed but may not experience a downfall.
A romantic hero is idealised and adventurous, not typically destroyed by his own flaws.
Therefore, the correct choice is the tragic hero.
Answer:D. tragic hero