What most likely was the author's purpose i using parallesim in the excerpt?

By using parallelism in line 3, the author places importance on the concept of equality.

Explanation:

In this excerpt, parallelism is being used in line 3. This is because both phrases in line 3 have the same grammatical structure, and they both start with the word "equal" ("equal access, equal justice"). The most likely reason why the author decided to write this line in this way is because he wanted the reader to pay attention to the concept of equality.