The word “therefore” (L.5) can be correctly replaced by thus...

Certo.

Synonyms Expand

hence, whence. Therefore, wherefore, accordingly, consequently, so, then all introduce a statement resulting from, or caused by, what immediately precedes. Therefore (for this or that reason) and wherefore (for which reason) imply exactness of reasoning; they are especially used in logic, law, mathematics, etc., and in a formal style of speaking or writing. Accordingly

Na verdade são Advérbios.

Therefore, thus = portanto, por isso, assim, por conseguinte

* Advérbios (ou locuções adverbiais) de modo

for that reason, consequently, so, as a result, as a consequence, hence, thus, accordingly, then, that being so, that being the case, on that account