Q. It is a belt around the Earth extending approximately five degrees north and south of the equator also known as?

[A] ITCZ

[B] Polar Westerlies

[C] Polar Jet streams

[D] Horse Latitudes

Answer: A
Notes:

Known to sailors around the world as the doldrums, the Inter-Tropical Convergence Zone, (ITCZ pronounced and sometimes referred to as the “itch”), is a belt around the Earth extending approximately five degrees north and south of the equator.  

  • Here, the prevailing trade winds of the northern hemisphere blow to the southwest and collide with the southern hemisphere’s driving northeast trade winds. 
  • Due to intense solar heating near the equator, the warm, moist air is forced up into the atmosphere like a hot air balloon. As the air rises, it cools, causing persistent bands of showers and storms around the Earth’s midsection.  
  • The rising air mass finally subsides in what is known as the horse latitudes, where the air moves downward toward Earth’s surface. 
  • Because the air circulates in an upward direction, there is often little surface wind in the ITCZ.  
  • That is why sailors well know that the area can be calm sailing ships for weeks. And that’s why they call it the doldrums. 

Source: NOAA