I believe that would be the Twenty Sixth Amendment.
Explanation:
Human factors that affect population density include social, political and economic factors. Factors, Sparsely populated, Densely Populated. Physical factor
Explanation:
It found a small but statistically significant association between reduced health care spending and increased death rates among children less than a year old, specifically that a10% reduction in health care spending led to an increase in infant mortality of 0.5% for boys and 0.4% for girls.
