It's sentence 3.
The ambiguous pronoun is "her". It is unclear whose graduation happened that day.
Hope this helps :)
It is used to prevent sand, mud, rocks, liquids, and other road spray from being thrown into the air by the rotating tire.
Contrast is the type of transition that is being used in the given passage.
It is showing a difference of not agreeing yet understanding between the author and the person that she's referring to.
Contrast transition words are transitional phrases/words that show contrasting relation<span> of two ideas. They are also used to emphasize negative and positive ideas. Some of the common contrast transition words are:
</span><span>A clear difference
But
Conflicting viewpoint
Despite
Even so/ Even though
For all that
However
In another way
</span>
<span>Ethos is an appeal to ethics, and it is a means of convincing someone of the character or credibility of the persuader.
</span><span>examples.yourdictionary.com/examples-of-ethos-logos-and-pathos.html</span>
