Answer:
(2) the same kingdom, but different species
Explanation:
Living organisms can be classified in five kingdoms: <em>Monera, Protista, Fungi, Plantae</em>, and<em> Animalia.</em>
Dogs and cats are classified in the <em>Animalia</em> kingdom, as they are composed of cells that are eukaryotic, have means for locomotion, and acquire nutrients by ingestion.
However they are classified as<u> different species because they do not mate with each other.</u>