Cats love sleeping.

Meaning: This means that cats have a strong affection or attachment to the act of sleeping and enjoy doing it. It's like saying, Cats really enjoy sleeping and often spend a lot of time doing it.

Choice of Words: Cats are small, carnivorous mammals that are often kept as pets. Love is a verb that means to have a strong affection or attachment to something. Sleeping is a gerund, which is a verb form that functions as a noun and refers to the act of sleeping.