During the resting heart, that is, the number of times the heart beats per minute while the body is relaxed and at rest does not change significantly with age; But with age, there are changes in the ability of the heart to increase its rate during exercise and other moments of stress. Younger hearts usually usually speed up more faster than older ones when challenged. The maximum heart rate, the highest heart rate one can achieve as measured by a cardiac stress test declines gradually in adults as they age. The cause of this is slowing down of the heart's pacemaker cells.
As people are always dying and babies are always being born so doctors don’t know the exact figure of the population, just an estimate.
hope this helps x
The answer to your question is C.Viral
Yes that is correct, self-efficacy is being applied
A good way to find that out is to calculate the number to get an estimate. for example, about one in every 12 people has asthma. so take the population of new york, and divide it by 12 to get an estimate of a number of people in the state of new york that might have asthma.