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The best answer for the question is:
OB. Tense.
Prepositions show relationships between nouns (or pronouns) and other words in a sentence. While prepositions can indicate various types of relationships like space (example: "The book is on the table"), time (example: "She arrived after dinner"), and logic (example: "He ran despite the rain"), they do not express tense. Tense refers to the time at which an action takes place (past, present, or future), and prepositions do not indicate this aspect of language.
Therefore, tense is the relationship type that prepositions do not show.
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