The zone of equatorial calm or Doldrums is the area that surrounds the Earth near the equator, which coincides with the low pressure belt. The strong warming of this area of the place to ascending currents as well as a warm and oppressive atmosphere, feared in other times by the Captains of the sailboats that had to cross it. The vertical movements that occur and the high humidity of the place to a sky, often covered with clouds of vertical development, rains, storms and electrical phenomena. The largest area of equatorial calm is in the Pacific.
The pressure gradient is the force that is produced due to the rotation of earth pressure cells that creates lighter air to move upwards and heavier to move downwards due to the difference in densities of air.
As the air above consists of lighter elements the oceanic air mostly consist of diatomic molecules of oxygen and nitrogen thus containing a large amount of water vapor, all these molecules have a mass that are pulled down by the gravity and this pull of gravity on columns of gas applies a force what we see an atmospheric pressure.
The gas particles and molecules of heavy and denser matter get stuck at the ground, similarly, as the air cools is descends and warm air rises. Thus upwards and downward motion of air causes convergence and divergence of molecules.
Although winters are very wet..summers in the biome are also very dry ...therefore causing it not to rain...so crops wont be able to grow there.....so your answer is ......d
