Answer:
Behavior therapy.
Explanation:
As the exercise explains, behavior therapy utilizes the principles of operant conditioning, classical conditioning, and/or observational learning to eliminate inappropriate and maladaptive behaviors. In other words, this therapy attempts to discover and seek those potentially self-destructive or unhealthy behaviors with the intention of changing them, as it believes that it is possible to change them.
Almost all metals form polycrystals while amorphous single-crystal metals are created synthetically. What this means is that metal crystals are actually many crystals that bonded. This is what polycrystals are and how they are combined with metal crystals.