1. humans(who lived as hunter-gatherers more than 10,000 years ago)fitted into ecosystems byacting as predators, and on occasion they probably also served as prey.

2. ray saw adaption as an expression of the way ( every organism was fitted for its assigned role in nature.)빨간색 부분에서요...
1번은 왜 능동으로 쓰이고, 2번은 수동으로 쓰인 이유 자세한 설명 부탁드리겠습니다~
읽어봐 주셔서 감사합니다~ 꾸벅~