Comprehension:
In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.
The rise in the Irrawaddy dolphin (1) _______ in Chilika can be attributed to the eviction of (2)  _______ fish enclosures.After thousands of hectares of Chilika lake were made (3) _______ free, Irrawaddy dolphins found unobstructed area for movement. (4) _______, due to the COVID-19
lockdown last year, there were comparatively fewer tourist boats on Chilika lake, which made it (5) _______ for dolphins to move from one part of the lake to another.

Select the most appropriate option to fill in blank no. 2.

The correct option to fill in blank (2) is "illegal".

Step-by-Step Explanation:
1. Let us read the sentence containing the blank: "The rise in the Irrawaddy dolphin (1) _______ in Chilika can be attributed to the eviction of (2) _______ fish enclosures."
2. We need to find the most appropriate adjective to describe "fish enclosures" that were evicted or cleared out to free up the Chilika lake area.
3. Let's analyze the given options in the context of legal and environmental regulations regarding unauthorized construction or enclosures in a protected water body like Chilika Lake:
- unwarranted: This means not justified or authorized, but it is typically used for actions, feelings, or behavior (e.g., "unwarranted criticism"), rather than physical, unauthorized structures.
- illegal: This means contrary to or forbidden by law. Unauthorized gherries or fish enclosures set up without permission in a government-regulated lake are unlawful or "illegal". Their removal (eviction) is a legal action taken by authorities against unlawful encroachments.
- illegitimate: While it means not authorized by law, it is more commonly used in contexts of status, heirs, children, or claims of authority (e.g., "illegitimate child" or "illegitimate claim"), and is less appropriate for unauthorized physical constructions in public water bodies.
- unconstitutional: This means not in accordance with a political constitution. Enclosing areas for fishing without a license violates local fishery laws or environmental protection regulations, making it "illegal" rather than a direct violation of the national constitution ("unconstitutional").
4. Therefore, the word "illegal" fits perfectly to describe the unauthorized fish enclosures that were evicted, allowing the dolphin population to move freely and thrive.