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) :)
A Roosevelt hinted that the US could not always remain neutral......
Trade with the Arabs did a few things for the African kingdoms. It increased trade, profit, and led to a ruling class.
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I would say 3, but in fact, it has at least a dozen climatic zones.
The three principal climatic zones are:
1) The tropical lowlands of the Caribbean region, wich are hot and humid
2) The interior uplands of the ishtmus, where the temperature climate is cool and damp in the valleys and plateaux, to cold in the mountains.
3) The lower Pacific slope and coastal plains, wich have hot and dry conditions
