Final answer:
Jane's need to move out due to the apartment's lack of heat and functional plumbing is known as constructive eviction, which occurs when poor living conditions force an inhabitant to leave.
Step-by-step explanation:
The scenario described where Jane is forced to move out of her apartment due to lack of heat and non-functional plumbing constitutes a constructive eviction. This term refers to a situation where a landlord has failed to maintain a rental property's essential services or living conditions, effectively making the premises uninhabitable and forcing the tenant to leave. It is different from actual eviction, where the tenant is physically removed from the property, or voluntary eviction, where the tenant chooses to leave on their own accord. Constructive eviction is recognized in legal contexts as a breach of the implied warranty of habitability that landlords owe their tenants.