What is a passive pronoun

This painting is by james whistler, and is entitled, symphony in blue and pink. what is the subject matter of this piece?

Which sentence contains a comma splice? marco rode to school on his bicycle this morning, he arrived an hour early. marco, who enjoys riding his bicycle to school, arrived just before the bell today. marco rode to school on his bicycle on monday, tuesday, and wednesday. marco, who rode to school on his bicycle this morning, arrived an hour early. mark this and returnsave and exit

When clarisse compares percy to the big three how does he feel