The two types of intellectual property laws that Aria and Camilla should consider to protect their orchestral piece of music are:
Trademark; patent
However, it's important to note that the most relevant form of protection for a musical composition would actually be copyright, which is not one of the options provided. If we are to choose from the available options, "Trademark; patent" is the best fit, as these can be relevant in certain contexts, but they may not be the most applicable for music.
For future reference, copyright is the specific legal protection they would seek for their composition to prevent others from claiming it as their own.