What metaphor best describes evolution a) random or chaos b)an improve comes routine or c) an architect building from blueprints

B

Explanation:

Evolution is a process of elimination.  the traits that are successful and help them survive are kept for the next population, because they are abet o survive to repopulate.  So its improvement.  

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.

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."