In our country, there are attempts to increase the height of several existing dams like Tehri and Almati, dams across Narmada. Choose the correct statements among the following that are a consequence of raising the height of dams
(i) Terrestrial flora and fauna of the area is destroyed completely.
(ii) Dislocation of people and domestic animals living in the area.
(iii) Valuable agricultural land may be permanently lost.
(iv) It will generate permanent employment for people.

Options

A. (i) and (ii)
B. (i),(ii) and (iii)
C. (ii) and (iv)
D. (i),(ii) and (iv)

Explanation

To determine the consequences of raising the height of dams, we can analyze each statement provided in the question. Here’s a step-by-step breakdown of the statements:

1. **Statement (i): Terrestrial flora and fauna of the area is destroyed completely.**
- When the height of a dam is increased, it often leads to flooding of the surrounding areas. This flooding can result in the destruction of local ecosystems, including the loss of terrestrial flora and fauna. Therefore, this statement is **correct**.

2. **Statement (ii): Dislocation of people and domestic animals living in the area.**
- Increasing the height of a dam can lead to the displacement of communities living nearby, as their homes may be submerged. Domestic animals that are part of these communities would also be affected. Thus, this statement is **correct**.

3. **Statement (iii): Valuable agricultural land may be permanently lost.**
- The area that gets flooded due to the increased height of the dam may include agricultural land. If this land is submerged, it can lead to a permanent loss of valuable agricultural resources. Therefore, this statement is **correct**.

4. **Statement (iv): It will generate permanent employment for people.**
- While construction and maintenance of dams may create job opportunities, these are often temporary jobs. The long-term employment situation may not improve significantly for the displaced people, as they may lose their livelihoods. Hence, this statement is **incorrect**.

Based on the analysis:
- The correct statements are (i), (ii), and (iii).
- The incorrect statement is (iv).

**Final Answer: The correct statements are (i), (ii), and (iii).**