Question

Which of these activities shown in the image has decreased the number of migratory birds to the Kolleru lake?

A: Commercial expansion of freshwater aquaculture
B: Industrial effluent dicharge into the lake
C: Communities of organisms prevailing in the same environment
D: Removal of rooted and floating weeds

• A. A
• B. B
• C. C
• D. D

Answer 1

Answer: (A), (B), (D)

The correct options are
A A
B B
D D

$\bullet$The Kolleru lake hosts 193 species of migratory birds and a variety of flora and fauna, but recently it faced a drastic decrease in the number of birds due to the practice of aquaculture, industrial pollution, and removal of weeds from the lake.
$\bullet$ Initially, aquaculture was started as a small profitable business in the Kolleru lake. But after the monsoon season when the sanctuary was dry, the villagers had burnt all aquatic plants and water weeds that served as food for migratory birds to construct more aquaculture ponds in the sanctuary.
$\bullet$ The number of birds slowly decreased due to loss of fodder in the lake. Besides, the industries had also polluted the entire lake with the effluent discharge ultimately making it inhabitable for the migratory birds.