The correct answer is option 4: "A country under threat of submergence due to ice melting and sea level rise."

Tuvalu, a small island nation located in the Pacific Ocean, has been a topic of discussion due to the imminent threat of submergence. This threat is primarily caused by the twin challenges of melting ice and rising sea levels.

As global warming accelerates, the Earth`s ice caps and glaciers are melting at an alarming rate. Consequently, the world`s oceans are expanding and causing sea levels to rise. This rising sea level poses a significant risk to low-lying islands and coastal areas like Tuvalu.

The potential submergence of Tuvalu has garnered attention because it highlights the pressing issue of climate change and its impact on vulnerable regions. It serves as a stark reminder of the consequences of human-induced global warming and the urgent need for action to mitigate its effects.

Alert - The provided answer is correct, no change needed.