Answer:
One of the great contributions the Sumerians made to civilization was their many inventions. They invented the first form of writing, a number system, the first wheeled vehicles, sun-dried bricks, and irrigation for farming. All of these things were important for the development of human civilization.
"Vengeful" because he wanted revenge after Fortunado offended him.
In this excerpt Marcus faces the conflict that his father doesn't agree with him. This type of conflict is called "Man vs. Man" It is the most common type of conflict in a piece of literature, it is also known as interpersonal conflict. In a man vs. man conflict, the protagonist, Marcus, feels something different than another character or the antagonist. This is the type of conflict that Marcus faces.
Hope this helps! :)