| A | B | C |
| (1) Melting of snow | (1) Increase in sea level | (1) Flooding |
| (2) Effects of insolation | (2) Erratic rains | (2) Increase in frequency of cyclones |
| (3) Greenhouse gases | (3) Methane | (3) Agriculture |
| (4) Climate change | (4) Average temperature of the earth | (4) Existence of life on Earth |




