(a) The graph given below, A and B, represent population of elephants in two different National Parks (a hypothetical situation) at different times.

Study the graphs and comment upon the pattern of growth observed. Mention the possible reason for such patterns seen in nature.

OR

(b) As per a recent newspaper report, a particular country showed decline population growth rate. According to you, what could be the two most possible reasons for this decline and why?

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Detailed Solution

(a) Graph A shows the exponential type of growth where the elephant population increases in the first national park as they get better living conditions between 1900 to 1980 whereas Graph B shows a decline in the population of elephants in the second national park. Reason for decline in the population of Graph B may be adverse growth conditions including unfavorable weather, competition between the species, less availability of resources, urbanization, fragmentation, etc.

OR

(b) The two reasons for the decline in population growth rate are:
i. Increase in death rate
ii. Migration

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