A statement is followed by two arguments I and II. Read the statement and the arguments carefully and select the appropriate answer from the given options.

Statement:

Hydroelectricity is a cleaner and greener energy than other forms of power generation.

Arguments:

(I) Hydroelectric plants almost have nil $$\text{CO}_2$$​ emissions.

(II) Hydroelectric power projects submerge huge amounts under water thereby affecting local flora and fauna.

Hydroelectricity is a cleaner and greener energy than other forms of power generation.

Let's analyze the arguments:

Argument I: Hydroelectric plants have almost nil CO₂ emissions. → Strengthens the statement.
This supports the idea that hydroelectricity is clean and green.
Argument II: Hydroelectric projects submerge huge land areas, affecting flora and fauna. → Weakens the statement.

This shows a negative environmental impact.
Thus, the correct option is (c)  II weakens while I strengthens the statement.