Question

what were the causes for the downfall of the Delhi Sultanate..?

Answer 1

In 1526 Babur invaded India and defeated lodi dynasty's ruler Ibrahim lodi on the battlefield of panipat.Thus, the Lodi dynasty and the Delhi Sultanate came to an end.

Answer 2

the invasion of Babur
The emperer of lodi dynasty was first Daulat khan lodi who was dethroned and Ibrahim lodi was the new sultan
Daulat was very angry and was waiting for a perfect chance to attack Ibrahim
Daulat Khan was the governor of punjab
Daulat khan invited Babur to india to defeat Ibrahim
Babur was also interested in india from years before due to its wealth and prosperity
Babur defeated Ibrahim Lodi in the 'FIRST BATTLE OF PANIPAT'
and the Legacy of Mughals started