The statement that best compares the concerns of India and island nations regarding the Paris Climate Agreement is:
India expressed concerns over being able to address poverty and reduce climate-changing gas emissions. Island nations expressed concerns over too much warming being allowed under the agreement.
This accurately reflects the differing priorities: India's focus on development and poverty alleviation alongside emissions reduction, while island nations are primarily concerned with the impacts of climate change, particularly the risks associated with rising temperatures and sea-level rise.