The unexpired insurance at the end of the fiscal period represents

Deferred expense

Explanation:

The deferred expense is the expense that is already incurred but it does not realize.

In other words, it is an advance payment or prepaid payment for the service to be consumed in the future. The cost is reflected in the asset side of the balance sheet.

It could be prepaid rent, prepaid insurance, etc

Since there is unexpired insurance at the end that reflects the deferred expense.