Part 2 of plate tectonics. pls help

Agricultural practices in the united states nearly led to the extinction of the peregrine falcon during the 1950s and 60s.

Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4

In which direction does the moving force of air flow? a-from warm temperatures to cold temperatures b-to areas of high pressure to areas of low pressure c-east to west d-from high elevations to low elevations