Answer:
External Invasions: The Mughal Empire encountered outer invasions from various foreign powers such as the British, who gradually advanced upon the empire's territories and eventually succeeded in subduing
Weak Successors of Aurangzeb:
The successors of Aurangzeb were weak and became victims of the intrigues and conspiracies of the faction-ridden nobles.
They were inefficient generals and incapable of suppressing revolts.
The absence of a strong ruler, an efficient bureaucracy and a capable army made the Mughal Empire weak.
After Bahadur Shah’s reign came to a long list of weak, worthless and luxury-loving Kings.