Which action would debit a member's earned points?

Debiting a member's earned points refers to the process of reducing the total points that a member has accumulated. Reversing an accrual transaction directly impacts the points balance by taking away previously earned points. When an accrual transaction is reversed, it effectively cancels out the initial points that were added to the member's account, thereby debiting or reducing their total earned points.

In contrast, other options either increase points or do not affect the points balance in a way that results in a debit. For instance, creating a new accrual transaction increases the points balance, reversing a redemption transaction would return points to the member's account, and manual points adjustments generally allow for adding or removing points, but not specifically debiting earned points as reversing an accrual does. Thus, reversing an accrual transaction is clearly the action that results in the member's earned points being debited.