That statement is true
an HR Diagram would plotted the absolute magnitude of the stars against their color. The resultant plots of this diagram showed that the relationship between the luminosity and temperature of the Star are not Random
You cant settle in deserts due to lack of water and scarcity of food, which led to the Saharan regions being less populated. Hope this helps.
The answer is Coriolis effects
Grids and variables are used to find coordinates. Latitude and longitude coordinates
