the correct answer is a.
switching from walking to taking the bus would mean a behavioral change that will result in a decrease in activity level. whereas you were getting some form of physical activity in walking you are now taking the bus which means your level of physical activity has dropped as you will be sitting on the bus not doing anything, before you were actively moving your body.
the answer is switching from walking to riding the bus.
Public health policies and government regulations are the basis of good health and disease prevention fo the public.
First of all, if we create public health policies and government regulations that allow people who possibly cannot afford their medications to get them for reduced price or free, we can increase the amount of people who have good health and aren’t prone to diseases.
Government regulations can also help people who are well off, too. If we put government regulations and policies in place promoting good health habits like washing your hands often even with the CDC, we would be able to show the public the benefits of good health.
Thus, using government regulations and health policies can help anyone and give support and reasons to the general public to maintain good health.
Hope this helps
Vaccines can be described as drugs, or medication, since that’s pretty much what it is. I’m sorry if I sound a little vague, but I don’t know much about this