which one of the following fragments is a prepositional phrase

None, apparently!

During the darkest night

To identify which one of the following fragments is a prepositional phrase, we first need to understand what a prepositional phrase is.

A prepositional phrase is a group of words that starts with a preposition and usually ends with a noun or a pronoun, which is called the object of the preposition. Prepositions are words like "in," "on," "under," "over," "with," "to," "from," etc.

Now let's look at the fragments and identify the prepositional phrase:

1. "The book on the table" - In this fragment, the preposition is "on," and the object of the preposition is "table." Therefore, the prepositional phrase is "on the table."

2. "Running through the field" - In this fragment, the word "through" is the preposition, and the object of the preposition is "field." So, the prepositional phrase is "through the field."

3. "Jumping over the fence" - In this fragment, the word "over" is the preposition, and the object of the preposition is "fence." Hence, the prepositional phrase is "over the fence."

Based on the explanations above, the correct answer is option 3: "Jumping over the fence," since it contains a prepositional phrase ("over the fence") that starts with the preposition "over."