Do your homework as soon as you get home.
If Beowulf represents the way Anglo-Saxons were, or what they wanted to become, then I believe they were fierce people. They were strong and brave (they managed to conquer the entire British isles) and they didn't falter when faced with dangers. They endured any hardships that they encountered and came out of their troubles strong, and created an entire nation of English people.
Some people think that they provided commentary on actions and events that were taking place before the audience.
Secondly, the chorus would allow the playwright to create a kind of literary complexity only achievable by a literary device controlling the atmosphere and expectations of the audience.
Basically, Colonialism is when a larger country takes political control of a smaller country.