Which of the following has have shrunk immensely dried up in the recent past due to human activities...........

Explanation:

Aral Sea has shrunk by about 75% of its original size mainly because of water diversion for agricultural usages in surrounding areas. In Lake Baikal, water level has gone below the critical mark of 456m eleven times since 1962. Thus, while Aral Sea has dried up immensely, Lake Baikal shows more of a fluctuating regime and shrinkage is not comparable to that of Aral Sea. So, statement 1 is correct but statement 2 is incorrect.

A compression of almost 40 % of the habitable space in the Black Sea, directly linked to its eutrophication and global warming. This phenomenon could be accompanied by major ecological and economic consequences. But this cannot be called immense shrunk. Therefore statement 3 is incorrect.