Final answer:
Intergovernmental grants for health have been crucial in supporting state and local governments by funding public health programs and providing fiscal relief during economic downturns.
Step-by-step explanation:
Intergovernmental grants for health have been an essential source of revenue for state and local governments. These grants help fund public health programs and initiatives and provide fiscal relief during economic downturns. For example, during the Great Recession of 2007-2009, federal grants increased by about 33 percent to support state and local governments as their revenue streams declined.