Maybe he's nervous or trying to calm himself down.
The cartoon boy could take a deep breath because he's about to face a challenging situation and needs to gather his courage. Or perhaps he's just been running and is catching his breath.
Maybe he's feeling stressed and trying to calm down.
Maybe they were scared or nervous about something coming up in the cartoon.
It could be that the cartoon kid is in a situation where they need to hold their breath to hide or stay quiet. Like when they don't want to be noticed by someone.
The quality of deep breath cartoon animation is quite good. The graphics are sharp and the movements are smooth.
Taking a deep breath might be related to the calming or immersive experience that a new kind of cartoon offers. Maybe it helps viewers relax and fully engage with the unique elements of the cartoon.
Maybe she ate something smelly or has a dental problem.
Maybe they ate something stinky or didn't brush their teeth.
Maybe she was running or doing some intense physical activity.
One popular character could be BreatheEasy Bunny who always takes deep breaths to stay calm.
It could mean the kid is nervous or trying to calm down.