In the southern elephant seal, males defend harems that may contain hundreds of reproductively active females. Modig (1996) recorded the numbers of females in harems in a population on South Georgia Island. The histograms of the data (below, drawn from data in Modig 1996) are unusual because the rarer, larger harems have been divided into wider intervals. In the upper histogram, bar height indicates the relative frequency of harems in the interval. In the lower histogram, bar height is adjusted such that bar area indicates relative frequency. Which histogram is correct? Why?

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Relative frequency Relative frequency 0.3 0.2- 0.1 0.3- 20 1 41 81 121 161 201 241 281 Harem size