Why does the author of a girl named zippy detail the population changes in mooreland from 1940 to 1980? to show the huge population decrease to show how the population compares to muncie to show that the population hasn't changed to show how the population compares to san francisco

Because the earth is not round ,but it may seem round when viewed from ,our planet but true some points earth is not round was an oblate spheroid -a square that it squashed as globe however is not even a perfect oblate spheroid.in fact isaac newton's first proposed that earth was not perfectly round but it was an oblate spheroid instead.that mean a square that is squashed as its poles and swollen at the