Improve the highlighted part of the sentence.
There's no waters in the swimming pool.

Option (a) is correct.
Explanation:
1. The word "waters" is incorrect because "water" is an uncountable noun and cannot be pluralized in this context.
2. The phrase "no water" is appropriate and grammatically correct.
3. The other options ("watering" and "none water") are incorrect as they either distort the meaning or violate grammar rules.
Hindi Explanation: "Waters" का उपयोग इस संदर्भ में गलत है। "Water" अनगिनत संज्ञा (uncountable noun) है, इसलिए इसे बहुवचन नहीं किया जा सकता। सही वाक्य होगा: "There's no water in the swimming pool."
Corrected sentence: There's no water in the swimming pool.