In converting to land life, animals acquired…………..

* Hướng dẫn giải

Giải thích: Dựa vào đoạn “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. They were completely converted for land dwelling, with bodies and biological activities far different from those of fish. “

Đáp án  B