Explanation
The correct answer is (B) Water hyacinth.
Harike wetland and bird sanctuary are indeed facing the problem of water hyacinth. Water hyacinth (scientifically known as Eichhornia crassipes) is an invasive aquatic weed that poses a significant threat to wetland ecosystems. It has the ability to grow and spread rapidly, forming dense mats on the surface of water bodies. These mats can block sunlight, deplete oxygen levels, and hinder the movement of water, causing negative impacts on the aquatic environment and biodiversity. The growth of water hyacinth can also impact the habitat and feeding grounds for birds, which can be a concern for bird sanctuaries such as Harike wetland and bird sanctuary.
