Review the passage:
Each morning when Helene is fixing her hair in the bathroom. She applies
many sticky hair products. During a typical day, she
catches more bugs in her coif than most spiders trap weekly in their webs.
You chose the third part, During a typical day, she catches more bugs in her coif .... This part has a main clause: she is the subject; catches is the verb. A fragment will not have a main clause.