What is the theory that explains the way the brain groups items according to proximity and similarity, as well as trying to complete an unfinished pattern or non-existent shape

The correct answer is Gestalt

Gestalt is a client-centered psychotherapeutic approach. This approach helps customers focus on the present. They come to understand what is really happening in their lives now. Instead of simply talking about past situations, customers are encouraged to experience current demands through reenactment.

Through the gestalt process, clients learn to become more aware of their own thinking patterns. They then come to know negative behaviors that can block true self-awareness and make them unhappy.

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.

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explanation: