Step 1: Evaluate the options
A) G20 Summit in Brazil: Focused on economic and global issues, with climate as a secondary topic.
B) COP29 in Azerbaijan: The 29th Conference of the Parties (COP) to the UN Framework Convention on Climate Change, held in Baku, Azerbaijan, in November 2024, directly addressed climate policies, commitments, and carbon reduction strategies.
C) BRICS Summit in Russia: Focused on geopolitical and economic cooperation, not primarily climate.
D) ASEAN Summit in Laos: Regional focus, less impact on global climate policies.
Step 2: Conclusion
COP29 in Azerbaijan was the key event for international climate policies in 2024, making (2) COP29 in Azerbaijan the correct answer.