In question you have two passages with 5 questions in each passage. Read the passage carefully and choose the best answer to each question out of four alternatives and mark your answer.

Passage I
Global warming is a very serious issue that is concerning every rational being on earth. Changes in rainfall and plant distribution as a result of global warming affect the migratory routes, feeding behaviour and mating habits of many birds. The rise in temperature might also lead to a change in ocean currents which might change their direction. The result will be the disruption of the entire marine eco system. Due to the warming of the Arctic region, huge amount of methane which is now frozen under the ocean shall escape into the air with the continous melting of the region. This will cause a vicious cycle as methane is a green house gas that traps heat in the atmosphere and the added emissions might increase the warming process. The damage done can only be negated now by making every individual environment conscious. This might help in making us hope to gift a green earth to our future generation which now appears to face the threat of extinction.

Passage II
Fleas are perfectly designed by nature to feast on anything containing blood. Like a shark in the water, fleas are ideally equipped to do what they do, making them very difficult to defeat. The body of a flea is covered by a tough, tile-like plate called Selerite, therefore making it impossible to squish it. Its body is also waterproof and shock resistant thus making it highly resistant to sprays and chemicals. Fleas are best jumpers and can reproduce rapidly. Fleas are intimidating opponents. The best way to control fleas is to take steps to prevent an infestation from ever occurring .

What might lead to a change in ocean currents?