Answer:
It gives the text a more personal, impassioned tone.
Step-by-step explanation:
In this excerpt, the words that are used by Simon Ortiz are informal. He uses words that would be common in a conversation between two friends. The effect of using this type of language is that Ortiz's words take a more personal tone. It shows that the issue being discussed is one that matters to him greatly. It also allows him to use an impassioned tone that makes the statements more persuasive.