Answer: As I was riding my bike, a squirrel darted in front of me.
Step-by-step explanation: a dangling modifier is a phrase or clause placed awkwardly in a sentence so that it appears to modify or refer to an unintended word. In most of the given sentences, the dangling modifier makes unclear who is riding the bike (the squirrel or the speaker) the sentence that corrects this mistake is "As I was riding my bike, a squirrel darted in front of me", in this sentence it is clear that the subject "I" is riding the bike.