Find one word which spelled incorrectly. the detective was sertain of the identity of
the suspect.

i don't have enough information to answer with a sure choice but these are the two answers that could answer your question:

impossible to solve.

incapable of being dissolved.

hope this ! =^-^=

the positive connotations of the words "pretty," "quiet," and "silence" give the excerpt a tone of nervousness. i think its this