gmat verbal sc parallelism

1)what is wrt
2)would you mind give me some examples ?

Dear teacher

i would like to ask a questions i have read the blog on magoosh about" Parallelism on the GMAT Sentence Correction"
and i have came across a few problems to ask .

the first one is does parallelism must share same subject between two or three element? if one of the logic of subject change, does is mean it is not parallel anymore
to make this clear
eg Marcus Junius Brutus (85 ??? 42 BCE) became friends with Julius Caesar, but he participated in the conspiracy that assassinated Caesar, and in subsequent centuries rose and fell according to the tides of various interpretations ??? as a treacherous villain in Dante and noble hero in Shakespeare.

second questions is that verbs in parallel need not have the same tense
but why is this wrong
Simon Bolivar (1783 ??? 1830) is remembered in that he led the independence revolutions in several South American counties, like Venezuela and Bolivia, and for instilling the ideals of democracy across the continent.

third is that verbs in parallel need not have the same tense

= pay close attention to the placement of any common words in parallel structure (one of the sentences of the three above has issues with the placement of a common word.)

= pay attention to what implied words we are allowed to drop, and especially how to handle the tricky issue of repeated verb phrases