1. Preposition: This is the word that introduces the phrase and shows the relationship between the object of the preposition and the rest of the sentence. Common prepositions include "on," "in," "at," "to," "from," "with," "by," "for," "about," and many more.
2. Object of the Preposition: This is the noun, pronoun, or noun phrase that the preposition is relating to the rest of the sentence.
Example:
* "The cat sat on the mat."
* "on" is the preposition.
* "mat" is the object of the preposition.
The entire phrase "on the mat" acts as an adverbial phrase, modifying the verb "sat".