DmitryFarber wrote:
adkikani , you're right that "traveling" modifies the present tense verb "begin" in A. There's nothing grammatically wrong with that. The problems with A are elsewhere: the redundancy of "at first begin" and the confusing phrase "that direction is the way."
As for "that" in B, it has to modify a noun, and "travel" is serving as a verb. It's directly modifying "east to west": east to west is the direction of the winds.
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