The pressure of the atmosphere changes with a change in height. When pressure is low, the attitudes are high.
Usually the pressure of the atmospheric level can be defined as total weight of air. There are only less air molecules present in the higher altitudes when compared to lower altitudes.
Therefore at high altitudes, the air pressure will be low . This is the reason why the air pressure is low at a higher point of elevation.
The Three Economic Sectors. According to the three-sector theory, all economic activity can be classified into one of three sectors: the primary sector, the secondary sector and thetertiary sector.
