Question

Match and find the correct combination.

(a)	Eutrophication	(i)	Rise in sea level
(b)	Biomagnification	(ii)	Water Hyacinth
(c)	Terror of Bengal	(iii)	Increase in quantity of pollutant at successive trophic levels
(d)	Green house effect	(iv)	Enrichment with nutrients

• A. a-iv, b-iii, c-i, d-ii
• B. a-i, b-ii, c-iii, d-iv
• C. a-ii, b-iii, c-iv, d-i
• D. a-iv, b-iii, c-ii, d-i

Answer 1

Answer: (D)

a-iv, b-iii, c-ii, d-i

Eutrophication excessive richness of nutrients in a lake or other body of water, frequently due to run-off from the land, which causes a dense growth of plant life. Biomagnification, is the increasing concentration of a substance, such as a toxic chemical, in the tissues of tolerant organisms at successively higher levels in a food chain. Fish is a supplement food in Bengal, and because of the fish scarcity in Bengal caused by Eichhornia, the water hyacinth is also called "Terror of Bengal". The greenhouse effect is a warming of the earth's surface and lower atmosphere caused by substances such as carbon dioxide and water vapour which let the sun’s energy through to the ground but impede the passage of energy from the earth back into space thus increases the sea level.

So the correct answer is 'a-iv, b-iii, c-ii, d-i'.