Question

which of the following is the leading cause of global sea-level rise today?
increase heat and melting of land ice.
increased global rainfall.
melting of sea stars and icebergs.
increased underwater volcanic eruptions.

Explanation:

Global sea-level rise is primarily driven by two linked factors from climate change: ocean thermal expansion (water expands as it absorbs heat) and the melting of land-based ice (like glaciers and ice sheets, which adds new water to the ocean). Melting sea ice/icebergs does not contribute significantly as they are already floating (displacing their volume of water). Increased rainfall and underwater volcanic eruptions are negligible contributors to current large-scale sea-level rise.

Answer:

Increase heat and melting of land ice.