Some turtles, such as the Musk turtle use smell to make them seem unappetizing. All turtles can hiss to appear threatening and many will bite if you get too close to their face. Also, another (rather obvious) method of protection is to tuck all soft areas; their head, feet, and tail, close to their body and use their strong shell to protect them from teeth and getting crushed (usually).
No.1: With there shells
No.2: They bite them
they hide in their shells
Turtles protect themselves by drawing their limbs, tail, and head into their shells
snapping turtles have teeth so they can protect themselves and their eggs
they protect themselves with their like rock shells.
snapping turtles have teeth so they can protect themselves and their eggs
because their scared and they wanna protect themselves
their shells has addapted to protect themselves
When they feel threatened, they hide in their shell, that's how they protect themselves
Mutually Assured Destuction (M.A.D.)
Some turtles can't protect themselves with their limb/head so they will urinate a foul urine with a pungent odor in attempts to protect itself.
Turtles will usually use their shells to protect themselves from other animals, weather, or anything else that can harm them. Or they could bite them.
So they can blend in with their natural habitat and protect themselves from predators
its hard bony shell provides protection and it will also bite