The connotative meaning of fault lines in this excerpt is something powerful and threatening.
A fault line is a break in the Earth's surface. It is mainly used to talk about a crack that occurs when the Earth's tectonic plates move or shift. In this excerpt in particular, <u>"fault line" has been used in a metaphorical way to refer to the power that world wars have to create a fracture between nations and the power they have to bring destruction.</u> In that way, "fault lines" has a negative connotative meaning in this excerpt, which means that unpleasant emotions are associated to that word. Moreover, wars are also conceived as something negative in these lines.
The past tense of yell is yelled. The third-person singular simple present indicative form of yell is yells. The present participle of yell is yelling. The past participle of yell is yelled.
