Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to tell a cheetah and leopard apart [title] Look at the cat's face. [step] Cheetahs have tear marks on their faces, which are black stripes starting from their eyes and going all the way until their mouths. Leopards don't have tear marks.

Ending1: [title] Notice the cat's eye color. [step] Cheetahs in captivity have bright eyes, and doe eyes with certain gradations of yellow inside. Ending2: If you look closely you will be able to see small tears hidden underneath the cat's skin and in the corners of the eyes which make them look like super tired kittens. [substeps] Another trick is to look at the cat's neck. Ending3: [title] Look at the cat's body. [step] Cheetahs are narrower, while leopards are fatter. Ending4: However, some cheetahs get tear marks from being scared or startled, which they tuck behind their ears. Look closely and try to distinguish a cheetah from a leopard.

Answer format: ending1/ending2/ending3/ending4