Question

1. how is the hydrosphere impacted by climate change? 2. what ecosystem is the most vulnerable to climate change? 3. how are humans affected by climate change?

Explanation:

1. Climate change can cause sea - level rise, altered precipitation patterns, and ocean acidification, all of which impact the hydrosphere. Sea - level rise floods coastal areas, changes in precipitation can lead to droughts or floods, and ocean acidification affects marine life.
2. Arctic ecosystems are among the most vulnerable due to rapid warming. Ice loss affects polar species like polar bears and walruses, and permafrost thawing releases greenhouse gases, further exacerbating climate change.
3. Humans are affected by climate change through increased frequency of extreme weather events (e.g., heatwaves, storms, floods), food and water insecurity due to changing agricultural conditions and water availability, and health risks from heat - related illnesses, vector - borne diseases, and poor air quality.

Answer:

1. Climate change causes sea - level rise, altered precipitation, and ocean acidification, impacting the hydrosphere.
2. Arctic ecosystems are very vulnerable due to rapid warming and ice loss.
3. Humans face extreme weather, food/water insecurity, and health risks from climate change.