Question

read the passage.
african wild dogs: ultimate predators?
many books, papers, and television shows have created an image of the african wild dog as the ultimate predator. according to these sources, the dogs coordinated teamwork and their unusual endurance help them catch about eighty percent of their prey. a 2012 study tested that notion. researchers fit a pack of wild dogs with special collars that recorded the dogs positions and speeds. the data that the collars recorded allowed the researchers to learn what the dogs did when they werent being observed. the results provided a surprising contrast with the dogs fierce reputation. the dogs never used teamwork in their hunts; they chased their prey over short distances as opposed to long runs; and instead of eighty percent, they brought down only about sixteen percent of their prey.
what is the main, or central, idea of the passage?
a study shows that african wild dogs catch about sixteen percent of their prey and do not use teamwork in hunting.
african wild dogs have a reputation as fierce hunters who work in teams, but new data suggests otherwise.

Explanation:

The passage presents a study on African wild dogs' hunting behavior, showing that a study reveals they catch about 16% of prey without teamwork, contrasting with their reputation. The option "A study shows that African wild dogs catch about sixteen percent of their prey and do not use teamwork in hunting" directly reflects the main idea from the passage's research findings. The other option talks about new data suggesting otherwise about their team - hunting reputation, but the main idea of the passage is centered around the study's finding about the percentage of prey caught without teamwork.

Answer:

A study shows that African wild dogs catch about sixteen percent of their prey and do not use teamwork in hunting.