Question
In context, which of the following is the best way to revise and combine sentences 1, 2, and 3 (reproduced
below) to create an effective opening sentence for the passage?
Many animals take up residence in places and structures vacated by others. People do the same thing. This
illustrates a phenomenon that economists and sociologists call a "vacancy chain."
When many animals and people do the same thing, taking up residence in places and structures vacated
by others, this illustrates a phenomenon that economists and sociologists call a "vacancy chain."
Many animals illustrate a phenomenon that economists and sociologists call a "vacancy chain" by taking
up residence with people in places and structures vacated by others.
Many animals and people take up residence in places and structures vacated by others, illustrating a
phenomenon that economists and sociologists call a "vacancy chain."
Economists and sociologists illustrate a phenomenon called a "vacancy chain" when animals take up
residence in places and structures vacated by others, including people.