What part of speech is in the sentence Yours was best display at science fair?

Let's break down the sentence "Yours was the best display at the science fair" to identify the parts of speech:

* Yours: This is a possessive pronoun. It shows ownership of the "display."

* was: This is a verb, specifically the past tense form of "to be."

* the: This is a definite article, specifying a particular display.

* best: This is an adjective, describing the "display."

* display: This is a noun, the object of the sentence.

* at: This is a preposition, indicating location.

* the: This is a definite article, specifying a particular science fair.

* science: This is a noun, modifying "fair."

* fair: This is a noun, the place where the display was shown.

Let me know if you'd like to analyze other sentences!