The sentence uses personification, alliteration, and imagery as literary devices.
Personification: This device is used in the sentence as 'Jack had a knack for packing picnic baskets with great food', where the picnic basket is described as having the human trait of being packed with great food.
Alliteration: The repetition of the 'p' sound in 'picnic baskets' is an example of alliteration in the sentence.
Imagery: While not explicitly present in the sentence, imagery could be included to describe the scene in more detail, appealing to the reader's senses.
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