The following options apply as distinctive aspects of the Hellenistic era's art and architecture:
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- Temples and amphitheaters were built to accentuate the natural surroundings.
- Relief work on vases was beautifully detailed.
- Beautiful pictures made of small tiles were created.
- Colossal sculptures were made of cast bronze.
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Option 3, "It was solid and thickset," does not seem to be a specific aspect of Hellenistic art and architecture and is not applicable.
I hope this helped!
~~~Harsha~~~