What is an example from history of early hydroponics?

The earliest examples of hydroponics date back to the Hanging Gardens of Babylon and the Floating Gardens of China.

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.

check for the pregnancy rating of drug. if its class c or d see if other alternatives