* Missing verb: The sentence lacks a verb to connect the subject "Cats" with the rest of the phrase.
* Incorrect preposition: "Fond" should be followed by "of" instead of "sitting".
* Unclear meaning: It's unclear what the sentence is trying to convey.
Here are a few ways to correct the sentence:
* "Cats, unlike dogs, are fond of sitting on laps." This clarifies the relationship between cats and dogs and adds the necessary verb "are".
* "Cats, unlike dogs, enjoy sitting on laps." This uses a more natural verb and clarifies the action.
* "Cats, unlike dogs, often sit on laps." This focuses on the frequency of the action.
The best way to correct the sentence depends on what you want to emphasize.