Bonjour!
Piranhas can devour any living thing in minutes, and sometimes even seconds. They are known for their ferocious attitude towards anything living; including others of their kind. They are some of the deadliest fish in the sea - watch out!
Hope this helps you!
~DL
The correct answer is cold fronts
The given blank can be filled with External.
The stimulus is a physical entity, which can provoke the response in the body of an organism. The hiding of the organism under the rock in response to the predator is and a type of external stimuli, as in this case, the organisms hide themselves inside the rock in response to the predator, which is present outside the body of the organism.