Ais a director whose films are marked by a consistent, individual style, and is closely involved in conceiving the idea for the film's story and writing the script.

The correct answer is auteur.
It is a French word which means 'author,' and it refers to directors who are different from other mainstream directors, but rather have quite distinctive and highly individual style of creating movies. Usually, they are less known, indie directors, but still very good.

Opposition of two melodic ideas is the  right answer 

This sounds like a personal reflection on something you did. it is asking the hardest part, or a part you may have struggled with on an informal interview you must have done. it is also asking advice you'd give someone else for the process of completing an informal interview, so you should write something that would . for example, maybe the first thing they should do, something they should include.