Correct Answer:
D. All of these
Global warming and climate change refer to the long-term heating of Earth's climate system due to human activities, primarily fossil fuel burning. All the listed options are direct and well-documented consequences. Rising sea levels (A) occur due to the thermal expansion of ocean water and the melting of glaciers and ice sheets. Extreme weather events (B), such as more intense heatwaves, droughts, floods, and storms, are becoming more frequent and severe. Melting polar ice caps (C) is a visible and significant indicator of rising global temperatures. Therefore, All of these (D) is the correct and most comprehensive answer.