The provision that allows a bond issuer to purchase bonds from customers prior to the...

Step by Step Explanation:

Call Provision: This allows the issuer to redeem bonds before their maturity date, usually at a premium to the par value, which benefits the issuer in a declining interest rate environment.

Put Provision: Allows bondholders, not issuers, to sell the bond back to the issuer.

Conversion: Relates to convertible bonds that can be converted into equity.

Defeasement: Refers to the removal of a bond issuer’s obligation by setting aside cash or securities to cover the debt.