С)why could the people understand each other ? what did the people decide to build? why did they want to build the city? why did god got get angry ? how did he punish the people ?

Why could the people understand each other? - They spoke the same language.
What did the people decide to build? A tower to the Heavens.
Why did they want to build the city? They wanted to overtake the authority of God.
Why did God get angry? People got too pompous.
How did he punish the people? He made them all speak different languages.