Answer:
A. . Scavenging/Sweep
Explanation:
People in Mesolithic era still obtained their food through hunting / gathering method. But, there's a little change within the method.
Before Mesolithic era, hunters generally only hunts for small/medium sized animals to feed small group of people. People in Mesolithic era decided to joined up in larger groups in order to hunt larger/stronger animals. After defeating these large animals, they scavenged the meat and store it for their food reserves that last a lot longer compared to small animals.
