Answer:
The U.S. Army wants to locate bears that have dens on their training grounds. It hired John, a biologist in Alaska, to find out where the bears hibernate.
Explanation:
A summary is a shortened version of a piece of writing, such as a paragraph, excerpt, chapter, or an entire book. It should include the main ideas of the text and only the most important details.
The option that fulfills these criteria is the first one. It summarizes what the text is about - about how the U.S. Army wants to locate bears that have dens on their training ground and how it hired a biologist named John to find them. The main point is covered and there are no unnecessary details.
The second option is the second best. However, it doesn't include some important details - the location and the name of the biologist.
The third and fourth options are incorrect because they include too much detail.
