During Akbar`s time, the ahdis were foot-soldiers in the army. Ahdis were a part of the Mughal military system and played a crucial role in battles and warfare. They were considered the backbone of the army and were responsible for combat on foot.

Option 1, village level money-lenders, does not accurately describe the ahdis of Akbar`s time. Money-lenders were not directly associated with the military and did not serve as foot-soldiers.

Option 2, village guards, also does not accurately describe the ahdis. Village guards were responsible for maintaining law and order within the villages and ensuring the safety of the villagers. Their duties did not involve military combat.

Option 3, cashiers working in diwani, is unrelated to the concept of ahdis. Cashiers working in the diwani were responsible for financial transactions and managing the revenue of the Mughal administration.

Therefore, the correct answer is 4, foot-soldiers in the army.