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L. Frank Baum. ... Lyman Frank Baum (/bɔːm/; May 15, 1856 – May 6, 1919) was an American author chiefly famous for his children's books, particularly The Wonderful Wizard of Oz and its sequels.
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it causes development rate to slow down, and more people will be born as high death rate often leads to a high birth rate.
The Indian Ocean trade routes used the geography to their advantage by utilizing the several islands along the way. The increased ports allowed for more goods to be traded, trade began over the Sahara desert as the Chinese people sent out envoys to scope the land. (Hope this helped you) :)
HE CAME UP WITH THE LAND-LEASE ACT