Yes. It is a warning that you are too close to one or you are a enemy.
They do both.
They can hiss and growl.
no
some hiss and some roars
It feels threatened.
No. Koalas growl, grunt and hiss, but they do not squeak.
Cats hiss and growl at each other as a way to communicate their discomfort or aggression. These vocalizations are used to establish boundaries and avoid physical confrontation.
Cats growl and hiss when playing to communicate their boundaries and establish dominance during playtime. These vocalizations help them express excitement, establish hierarchy, and set limits with their playmates.
Cats hiss and growl when they play because it is a natural behavior that mimics hunting instincts. These sounds can be a way for cats to communicate and establish boundaries during play, even if they are just having fun.
Both, the dog has a normal growl and the cat's growl is more of a hiss
Angry cats growl and hiss. You can write "Rrrrrr" or "hiss" or make up your own way of sounding out the noise.
An alligator can make a low-frequency bellowing sound which is often described as a deep, booming noise. This sound is used during mating rituals, to establish territory, or as a warning to potential threats. It can carry over long distances due to its low frequency.