“In the meantime” indicates a shift in time.
When community service is required for graduation it sparks creativity in students and propels them to create projects that may have a profound impact on the local community. Also, when students work with community leaders in public service they start to make connections that may help them later in their careers or life.
Sentence 4 because it summarizes the paragraph but does not give an opinion like answer but used factual evidence to support it.
The represent that the shape of the wall was a portent.
