What exactly do you need to analyze? I guess you have forgotten to add the lines. Our answers would be more helpful.
The answer is parallelism.
The subject of the sentence is her sketches. Also at the beginning of the list it says their unusual perspective so you have to continue using plural pronouns.
The sentence should read: Her sketches are unusual because of their unusual perspective, radical use of color, and their unexpected subjects.
Answer:
when you don't know what the word mean
Incorrect we have to put comma after Aunt Amelia
