Consider the following statements regarding the major landscapes shared between India and Nepal:

1. The Terai region, a lowland area at the base of the Himalayas, spans across southern Nepal and northern India and is crucial for agriculture in both countries.

2. Susta, a disputed area due to the changing course of the Gandak River, lies in the high-altitude zones of the Himalayas, making it less accessible and sparsely populated.

Which of the statements given above is/are correct?