Hello can someone help me with this?english is not my first language so im having a hard time judging this speech soundness of the author's reasoning

1)what are the evidences (data, statistics, research)used by the speaker to prove her point?

2)what are the examples and opinions used by the speaker to prove her point?

(the speech is in the picture)​

faithful servants eumaeus and philaetius:

his ragged vest then drawn aside disclosed the sign conspicuous, and the scar exposed: eager they view'd, with joy they stood amazed with tearful eyes o'er all their master gazed:

these servants know ulysses by the scar he got when he was a child - so when he showed them the mark, they immediately knew this is truly their master and they hugged him, finally starting to believe his words.

daf

explanation:

the universe is complete credible source of our oxygen