On page 139 in the book blood on the river samuel's jaws drop what does that mean

Refer to the list of words parts on the left to answer the questions. what prefix is used in the word incredulous? what suffix is used in the word incredulous? what word root is used in the word incredulous?

Is directly communicated and requires little interpretation

According to the speaker, decisions in west african villages are made through discussions led by heroic nobles wise historians elected representatives appointed chiefs