Parallelism takes place when there are actions or nouns using the same grammar pattern, in the case of the excerpt provided it is possible to read "He has" several times. The "He" in the declaration of Independence refers to the then King of England who has demonstrated a low sense of justice and honor. The obstruction of justice is attributed to this unfair ruler. The parallel structure, in this case the sentences are in the present perfect, serves the purpose of reminding the audience of the bad actions that the king has taken against the sovereignty of the people.