Final answer:
The end of Gizelle's relationship with Janitorial Services, Limited Partnership and the resulting decision by Haya and Ivy not to continue the business is termed dissolution, which refers to the formal ending of the partnership.
Step-by-step explanation:
When Gizelle's relationship to the firm Janitorial Services, Limited Partnership ends, and Haya and Ivy agree not to continue the business, the term used to describe this situation is dissolution. Dissociation refers to a partner leaving a partnership, while dissolution refers to the winding up of the partnership entity itself.
In this case, the trigger for dissolution was the decision not to continue the business after a partner's dissociation. This is not to be confused with gross negligence or simple misconduct, as those terms relate to a partner's failure to fulfill duties or engage in improper behavior respectively, and are not applicable to the termination of the business’s operations.