What is the most essential plant in the sahara desert. why is it essential to the sahara desert?

Air masses are characterized by various properties including temperature humidity air temperature pressure and wind speed . which of the following air masses is associated with low relative humidity and high temperature

Ineed , i need to create a power point in life science here is a picture explaining a little what the topic is about, me with some information for my slides : (

What is the best way to describes europe population