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What element do prepositions help establish in a sentence?

  1. Definiteness

  2. Connection

  3. Place or time

  4. Comparison

The correct answer is: Place or time

Prepositions help establish the relationship between nouns or pronouns and other words in a sentence, particularly relating to place or time. They provide crucial information about the location, direction, or time of an action or event in a sentence. In this way, prepositions play a significant role in conveying the spatial and temporal aspects of a sentence's meaning. Choices A, B, and D do not directly relate to the primary function of prepositions in establishing place or time within a sentence.