Explanation:

Certainly! Let's delve into the options provided:

- Walis: These were governors or administrative heads in certain Islamic empires, but the term is not specifically related to influencing the Bahmani and Vijayanagar kingdoms from the Delhi Sultanate.

- Cahalgani: It was a group of 40 powerful nobles during the Delhi Sultanate, known as the "Chalisa". This system did not influence the Bahmani or Vijayanagar kingdoms.

- Bitikchi: The term does not directly relate to administrative practices of the Delhi Sultanate with noted influence on the mentioned kingdoms.

- Iqtadari: This is the system of land revenue and military administration used by the Delhi Sultanate. This system significantly influenced both the Bahmani and Vijayanagar kingdoms. It involved granting lands to officials as a way to manage and collect revenue.