<span>the bones rub together and cause damage</span>
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>
The answer to your question is D
