Who has responsibility to ensure the safety of food?

I would say the FDA, the food and drug administration

The Food Safety and Inspection Service (FSIS) is the public health agency in the U.S. Department of Agriculture responsible for ensuring that the nation's commercial supply of meat, poultry, and egg products is safe, wholesome, and correctly labeled and packaged.

Idk why don’t you pay attention ok class

The answer is b. increased blood flow reduces nerve sensitivity