Dear Sir, In response to your query, the document that "explains" our country’s sustainability initiatives has been attached for your consideration.
Explanation: The verb explains is used in the simple present tense to agree with the singular subject document. This ensures subject-verb agreement.
शहनाई की जादुई आवाज का असर हमारे सिर चढ़कर बोलने लगता है । (मिश्र वाक्य में बदलिए)