When it comes to selecting a specific part, there are a variety of synonyms that could apply. One option is to use the word "preferred" to indicate a desired part or selection. "Chosen" is another popular term to denote a selected item or decision. "Elect" is often used in more formal contexts and is related to the act of voting, but can also apply to selecting a preferred part. "Opt" is another commonly used term, indicating that the most desirable choice has been identified and selected. Other synonyms for "choice/select part" include "picked," "selected," "decided," and "determined." Ultimately, the best choice for a particular situation will depend on context and the intended tone of the message.