question_answer 29)

  Rainfall patterns depend on (a) the underground water table (b) the number of water bodies in an area (c) the density' pattern of human population in an area (d) the prevailing season in an area

Answer:

  (b) The rainfall pattern and amount of rainfall directly depends on the number of water bodies in an area when the water bodies of an area are heated during the day, a large amount of water evaporates and goes into the air. Some amount of water vapour also get into the atmosphere because of various biological activities. This air also gets heated due to the sunlight. The hot air rises up carrying the water vapour with it. As the air rises, it expands and cools. This cooling causes the water vapour in the air to condense in the form of tiny water droplets. The condensation of water is facilitated if some panicles like dust and other suspended particles could act as the 'nucleus' or center particle for these drops to form around. Once the water droplets are formed, they grow bigger by the condensation. When the drops have grown big and heavy enough they fall down in the form of rain.