Question

Insert one comma to separate the coordinate adjectives.

Designed by Thom Mayne and associates, the Perot Museum of Nature and Science is an exceptional award-winning structure. The building features an escalator housed in an unusual glass tube.

Answer 1

To separate coordinate adjectives, a comma is needed if the adjectives equally modify a noun and can be coordinated with 'and'. In the example sentence, the necessary comma would be placed between 'exceptional' and 'award-winning.'

Step-by-step explanation:

The student's question requires the insertion of a comma to correctly separate coordinate adjectives in a sentence. When two adjectives equally modify a noun and could be coordinated with 'and', they should be separated by a comma. For example, in the sentence 'The Perot Museum of Nature and Science is an exceptional, award-winning structure', 'exceptional' and 'award-winning' are coordinate adjectives describing the structure, hence the comma insertion.