Aperson with a heart problem needs a pacemaker but is unable to pay for it. what, then, is the source of effective demand for this technology? who ultimately pays for it and why?

A person with a heart problem needs a pacemaker but is unable to pay for it. The person can approach the various social groups like the non-government organisations to put forward a demand for financial assistance. The non-government organisations have funds that have been collected through various individuals or multinational companies or health organisations that participate in donation programmes. They use these to buy the pacemaker for the needy patient.

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.