You have to read it quickly and get to know the main points in that article, and even read well how they explained those main points, then after you finish reading your article, you write the summary of that article according to how you have understood it.
A declarative sentence is a kind of sentence that only declares or simply talks about a certain topic. A declarative sentence only ends with a period. In the given sentence above, it can be rewritten into a declarative sentence as: In Berkeley, you can see representations of these ferocious animals. The sentence with the period.