Yes it is it is contained in a plane
Quite simply, word of mouth and then deep faith in those that preached.
Northern Hemisphere portrays the upper air westerlies having troughs as well as ridges. The upper air westerlies depicts clockwise curvature in elevation. On a weather map of the Northern Hemisphere, one can see the westerlies among the subtropical highs and subpolar lows.
Out of all 7 areas, it's #5.
Out of 1, 2, 3, or 4, it's #4.
The correct answer is:
<span> Being granted more beneficial trade treaties </span>