In the population having high growth rate, the age pyramid is shown by
The population of a particular region depends on the climatic condition prevailing in that particular region. A population's growth rate is strongly influenced by the proportions of individuals of particular ages. In an age pyramid, the population is sequentially arranged according to the increasing age. The young ones forms the base of the pyramid. For example, the population of a country with rapid growth has a triangle-shaped age structure with a greater proportion of younger individuals who are at or close to reproductive age. This pattern typically occurs where fewer people live to old age because of sub-optimal living standards, such as occurs in underdeveloped countries.
Thus, the correct answer is option A.