Answer:
Maturity value; Default; Sinking fund provision; Call provision.
Step-by-step explanation:
Maturity value is the sum payable to an investor toward the finish of a debt instrument's holding period (maturity date).
Sinking fund provisions means a provision in some bond indentures requiring the backer to set cash aside to reimburse bondholders at maturity.
A call provision is a provision on a bond or other fixed-pay instrument that enables the guarantor to repurchase and resign its bonds.