The reason why Son Doong Cave was formed is that …

6/15

The reason why Son Doong Cave was formed is that ………..

an underground tunnel was buried in the area

the limestone areas were soft

it only happened from 2 to 5 million years ago

the river was buried in the limestone mountains

Giải thích

Đáp án: D

Thông tin: Son Doong Cave was formed from 2 to 5 million years ago, when the river flowed through the limestone mountain area and was buried.

Dịch: Hang Sơn Đoòng được hình thành từ 2 đến 5 triệu năm trước, khi dòng sông chảy qua khu vực núi đá vôi và bị chôn vùi.