Maybe the dog is just really tired and needs some good rest, so it's snoring.
It could be that the cartoon dog is in a super comfortable position and has fallen into a deep sleep, causing the snoring. Or perhaps it had a busy day and is now completely worn out.
The cartoon dog might be snoring because the environment is too peaceful and relaxing, making it let its guard down and snooze loudly.
It could be because a snoring dog makes for an interesting and unique character. It might attract kids' attention and bring some lightheartedness to the story.
Maybe she's really tired and needs a good rest. That could cause her to snore.
It could be that the cartoon man has a blocked nose or is in an uncomfortable position, causing him to snore. Or perhaps he had a busy day and is now sleeping soundly and snoring as a result.
Maybe the cat is just really tired and in a deep sleep. That can cause it to snore.
It could be because the creator wanted to highlight something unusual or create a memorable character. Or it might be part of a story with a special meaning related to sleep or a particular trait of the girl.
The exaggerated expressions and sounds usually do the trick. Maybe a character's face contorting while snoring loudly can be hilarious.
Maybe she's really tired and fell into a deep sleep, that's why she's snoring.
It could be that the car ride is super boring and made her fall asleep and snore. Or she might have had a late night before and is catching up on sleep now.
In cartoon animation, snoring is typically shown in a comical way. It might involve big puffs of smoke or the character's bed shaking. It's all for the sake of adding some lightheartedness to the scene.
It could be that he's in a super comfortable environment and just can't help but doze off and snore. Or perhaps he has some sleep disorder.