Wind is caused by differences in pressure. Isobars represent pressure - thus if there are more closer together there is a stronger wind - so it's country B.
The closer the isobars are, the windier it is. Therefore, Country B has high winds.
Hope this helps. :)
The map for County B shows high winds because its isobars are close together. Close isobars indicate a steep pressure gradient, resulting in faster moving air. In contrast, the isobars in County A are far apart, suggesting lighter winds.
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