comma splice [clause coordination]; dash with apposition

[Julianus]

Hello.

1. a. This results in a tension in the art world that is largely unresolved ─ the tension between art as a satisfying mode of expression and art as a precious collectible object, between the experience of making and the experience of owning. (from Korean university entrance exam)

Question 1: My book says that in this sentence, dash is used for the additional information about the former, whole sentence. But I think that it is used for the additional information about only 'a tension'. Am I right?

Question 2 : I think that the comma before the second between is used for avoiding a confusion with the first between. Am I right?

Thank you always~.

 

[Copyright]

1. I think it expands on what is meant by "tension" in the fifth word of the sentence -- so it is for additional information.
2. I think the comma takes the place of an "and" which is not being used because both clauses already have "and" so it would be confusing. It also sounds better with a comma ... slightly more dramatic.

 

[Cenzontle]

The comma in "...object, between..." helps to establish the parallel between the two "betweens", and—as Copyright said—to signal the "and" relationship between the two "between" phrases.
Without that comma, a reader might (momentarily) think the last "between" phrase modifies "object", rather than "tension".