A) Antarctica is the world's coldest and iciest region.
B) Mammoth Cave National Park is the longest cave system on Earth with a stretch of 640 km underneath a limestone ridge.
C) Great Barrier Reef is the world's second largest living structure that can be seen even from the Moon.
D) Both (a) and (b)
Correct Answer: C
You need to login to perform this action.
You will be redirected in
3 sec
