Prawn farming is a practice that involves the cultivation of prawns in specially designed ponds or lakes. In this question, we are asked to identify the lake in India that is endangered by prawn farming.

Option 1: Chika - The correct answer. This option states that the Chika lake is endangered by prawn farming. Since Chika is the correct answer, no further analysis of the other options is necessary.

Option 2: Dal - This option does not mention anything about prawn farming, so we can eliminate it as a potential answer.

Option 3: Pulicat - This option does not mention anything about prawn farming, so we can eliminate it as a potential answer.

Option 4: Sambhar - This option does not mention anything about prawn farming, so we can eliminate it as a potential answer.

In conclusion, the correct answer to the question is option 1, Chika. Prawn farming is endangering the Chika lake in India.