Question 4 by regulation any drone being piloted for commercial purposes needs at least people 04 01 03

Write a short paragraph of about 150-300 words. explain how the physical environment can limit human activities.

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

Which layer surrounds the center of the earth? a: crust b: core c: mantle