Answer:
The correct answer is option A, that is, it is a high pressure zone with sinking air.
Step-by-step explanation:
The intertropical convergence zone denotes a girdle of low pressure that encircles the Earth usually close to the equator where the trade winds of the Southern and the Northern Hemispheres combine together. It is featured by the convective activity that produces dynamic thunderstorms over the huge regions.
The intertropical convergence zone possesses mounting air with common thunderstorms and consequent precipitation and is termed by the seamen as the doldrums. Thus, it is not a high-pressure zone with sinking air.