The adaptation process described in the article was completed

Đáp án C
Giải thích: Quá trình thích ứng hình thành qua thời gian dài và thông qua những biến đổi sinh học của cơ thể để thích ứng. Thông tin nằm ở: “Millions of years after the first clumsy amphibians crawled over the land, newer types of land dwellers appeared, these animals give rise to the present-day reptiles and mammals.” “These vertebrates, the fish, were adapted to underwater living. Their streamlined bodies were covered with scales to reduce surface friction: ...”