Explanation:
शिखर सम्मेलन
summit, summit conference
सम्मेलन
summit, Gathering, palaver
शिखर सम्मेलन
shikhar sammelan
Answer:
A. Details that reinforce the main idea
Explanation:
This is because supporting details are an explanation for the main idea. Therefore the main idea is backed up (reinforced) with details that support it.
