I sentence that contains an element of bias could be one that states an opinion. For example, "I think her shoes are ugly, mine are better." the person talking is biased because they really like their shoes.
Answer:
Panchito’s
Explanation:
Francisco is the narrator of this book. His nickname is Panchito. So the correct choice would be
Panchito’s.
It was powerful in war and in magic,and its priests and medicine men were feared in all the surrounding country.