I would say that this sentence contains examples of colloquialism.
Colloquialism is <span>a word or phrase that is not formal or literary and is used in ordinary or familiar conversation.</span>
Answer: indirect object
Have a nice day/night :)
The <em>older violins</em> are more than one object, in this case its cannot be used, only their; <em>each violinist</em> could mean male or female, so it would be possible the use of his or her or their (applied for either),but there is only the latter option. The correct answer is their/their.
<em>The older violins no longer had their original parts, but each violinist played their instrument well.</em>
James is smarter than Steven. Since smarter is already used to show that James has a higher mental ability than Steven, there is no need for "more"
In the second sentence, the adjective is delighted. In the third sentence, the adjective is large. The first sentence doesn't contain an adjective.