The wind shear associated with several major airline crashes is ...

[RRMR]

The wind shear associated with several major airline crashes is believed to have been caused by:
  a. microbursts
  b. dry lines
  c. the jet stream
  d. mesocyclones

Question 2

A small thunderstorm cloud with virga falling out of its base and blowing dust at the ground
  could warn of a severe hazard to an airplane because:a.
   this could be the first indication of a tornado
  b. it is likely that hail will soon begin to fall
  c. this could indicate an intense downdraft or microburst
  d. the airplane could be struck by lightning

[Sarahjh]

Answer to Question 1

a

Answer to Question 2

c

[RRMR]

Great answer, keep it coming

[T4T]

Thanks for the timely response, appreciate it