Many of the ecological problems facing our world concern events and practices that occur in less developed countries. Many of these practices are the result of
centuries of cultural evolution. What approach should people and institutions of
developed countries take in helping to encourage ecologically minded resource
use?

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.

answer: i cant find your answer. do u have another way i can answer it for you : )

explanation: