答案

\"Human commensals describes a biological phenomenon that animals are able to adapt to the surroundings with the existence of human actions, taking advantage of human activities.
The professor talked about two example s of birds. For example, there is one kind of bird, dove, rather than nesting with natural materials, living in the campus building, which saves a lot of its energy. And it is safe to raise their children here. Another example is also about dove, which dines on the campus garbage. The easy food, the remains of human food, provides the bird enough nutrition. Plus, students on campus will feed them with meat and vegetables from time to time.  (111 words)
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