Answer:
Chamber.
Explanation:
Chamber music is written for a small ensemble or a group that could fit in a large room.
It could not be the other options, because,
1. A symphony is a large group of instruments.
2. A piano sonata is performed by a soloist.
3. An opera is not performed by an ensemble.
Hope this helps!
The first is an onion dome. The second is a barrel vault. The third is a rotunda dome. The fourth is a corbel arch.
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