Viceroy butterflies look much like the monarch. because of this, they are saved from predators also. this protective mechanism is best called

The correct answer is mimicry.

Explanation:

In biology, a phenomenon featured by the superficial resemblance of two or more organisms, which are not closely associated taxonomically is termed a mimicry. This resemblance demonstrates a benefit like safeguarding from predation.  

Mimicry can involve behavioral or physical traits, and well-studied illustrations are Mullerian and Batesian mimicry. The resemblances, which evolve in mimicry can be acoustic, visual, tactile, chemical, or combinations of these sensory modalities.  

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex