Answer:
-Subpolar low: Lies along the polar jetstream
-Horse latitudes: The trade winds and westerlies originate here
-Doldrums: Heavy precipitation, little wind
Step-by-step explanation:
A subpolar low is an area of of low pressure located between 50° and 70° latitude which is the upper levels of the atmosphere where narrow bands of strong wind form resulting in jet streams
Horse latitudes are areas of calm air and sea also known as the equatorial calm, it is also where westerly winds originate because it is a high-pressure are with warm air
Doldrums occur near the equator where the trade winds meet in the intertropical Convergence Zone, an area where the northeast and southeast trade winds converge and lift up resulting in formation of thunderstorm clouds.
This convergence results in no steady surface winds hence, no wind but more rain