Over the past 50 years, rates of have declined among american adults.

The answer would be: death from cardiovascular disease
There are two major factors that contribute to this occurence:
- The development of many fast foods restaurants which food contain a high amount of saturated fats that could block our arteries
- The rise in tech massively reduce people's average time used to go out and exercise

Fiscal policy because it refers to the use of government spending and tax policies to influence macroeconomic conditions, including aggregate demand, employment, inflation, and economic growth.