The possible communication that will take place in both situations includes mass communication and public communication.
From the complete question, some artists are having a gallery show of their paintings in SM City depict mass communication. On the other hand, a live concert in the town plaza depicts public communication.
Mass communication simply means the exchange of information to a wide range of people. In this case, there's an exchange of information to a large population. Since some artists are having a gallery show of their paintings, this means that there'll be more people in such an area.
Also, a live concert in the town plaza depicts public communication. In this case, the person will pass information across to the audience.
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