Which of the following are the impacts of Global Warming?1.Rise in sea level2.Melting of glaciers3.Spread of diseases4.Bleaching of Coral reefsSelect the correct answer using the codes given below.

1. A

   1, 2 and 3 only

   1, 2 and 3 only omits coral bleaching, a well-documented warming impact via marine heatwaves.

2. B

   2 and 3 only

   2 and 3 only drops sea-level rise and bleaching.

3. C

   1, 3 and 4 only

   1, 3 and 4 only omits glacier melt, which feeds both sea-level and river-seasonality changes.

4. D

   1, 2, 3 and 4

   All four are impacts of global warming: thermal expansion and ice melt raise seas; glaciers shrink; vector ranges and heat stress spread disease; coral expels zooxanthellae and bleaches. That is the official key.

Summary. Official key is (d) 1, 2, 3 and 4. IPCC-style impact lists include oceans, cryosphere, health and reefs together. Honour the stored letter (d).