Read the passage carefully and answer the questions no. 4 and 5 :

Bangladesh is blessed with huge inland open water resources. It has numerous rivers, canals, beels, lakes and vast areas of flood plains. Hakaluki Haor is one of the major wetlands of Bangladesh. With a land area of 18,386 hectores, it supports a rich biodiversity and provides direct and indirect livelihood benefits to nearly 1,90,000 people. This haor was declared an ecologically critical area in April 1999 by the Government of Bangladesh. Hakaluki is a complex ecosystem, containing more than 238 interconnecting beels and jalmahals. The haor falls into two administrative districts-Maulovibazar and Sylhet. Some 1,90,000 people live in the area surrounding the haor.

The haor is a very important resting place of migratory water-fowls flying in from the north. The interesting species is the Barheaded Goose which is now hardly seen in fresh water wetlands. Hakaluki Haor is known as a good grazing land in winter. The haor had very dense swamp forests in the past, but deforestation and lack of conservation practices have virtually destroyed this unique forest in the last two decades.