in which stage of the Epidemiological Transition Model do most people die from degenerative of chronic diseases (such as heart disease) ASAP

Olshansky and Ault [10] proposed a “fourth stage” of epidemiologic transition, “The Age of Delayed Degenerative Diseases,” in which declining age-specific mortality results in a gradual shift of non-communicable burden to older ages, with underlying causes of death showing little change overall.

stubborn should be the answer.