Final answer:
An aria is a vocal solo with orchestral accompaniment, while a recitative is a speech-like singing style.
Step-by-step explanation:
An aria is a vocal solo with orchestral accompaniment, while a recitative is a speech-like singing style. This means that in an aria, the singer performs a solo piece with support from an orchestra, while in a recitative, the singer adopts a more spoken style of singing. Arias are typically more melodic and structured, with a clear melody and often featuring emotional expression, while recitatives are more natural and conversational, used to advance the plot or provide narrative information in an opera or musical.