Which of the following has/have shrunk immensely/dried up in the recent past due to human activities?<br/>1. Aral Sea<br/>2. Black Sea<br/>3. Lake Baikal<br/><br/>Select the correct answer using the code given below:

1. Aral Sea — Correct. It has shrunk drastically due to large-scale diversion of the Amu Darya and Syr Darya rivers for irrigation, especially cotton cultivation.

2. Black Sea — Incorrect. It has faced serious pollution and ecological stress, but it has not shrunk immensely or dried up in the recent past.

3. Lake Baikal — Incorrect. It has suffered pollution and local ecological pressures, but it has not dried up or shrunk immensely due to human activities.

Hence, only 1 is correct.