Question

11.
Which one of the following is not an advantage of building large dams?
(A)
Adequate storage of water
(B)
Generation of electricity
(C)
Decrease in biological diversity
(D)
Use in growth of water intensive crops​

Answer 1

Answer:

the answer is

Explanation:

c) decrease in biological diversity

Answer 2

Decrease in biological diversity is not an advantage of building large dams.

To properly understand this answer, we have to know more about the advantages of large dams.

Advantages of large dams :

• Large dams are constructed across rivers for many beneficial reasons.
• One of the most important reasons of constructing large dams is generating electricity from hydroelectric power plants.
• The water stored in the reservoir of the dam can be used for agricultural purpose (for growing water intensive crops).

Which means, the statements mentioned in option A,B and D are advantages of a large dam.

On the other hand, decrease in biological diversity (disturbs the local ecosystem) is a disadvantage (because this effect is purely unwanted) of a large dam.

Hence, decrease in biological diversity (option C) is not an advantage of building large dams.

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