Aria and Camilla should consider "Trademark; patent" as the two types of intellectual property laws to protect their orchestral piece of music.
However, in the context of music, they might actually be more concerned with copyright rather than patent. Patent law typically does not apply to musical compositions. It's important for them to protect their work primarily through copyright, which safeguards original works of authorship, including music.
So, though the options provided do not include copyright, the best applicable option from the list given would be "Trademark; patent," as trademarks can help protect associated branding. In real-world practice, they should prioritize copyright for their specific needs.