Directions: Choose the option that best replaces the underlined portion.

He decided to light out for the country, unsure of what had instigated his departure, knowing only that he needed to escape civilization for a time.

The meaning of term 'Light out' is to depart or leave. So, the sentence says that the person left for countryside without knowing why he did that, except he wanted to leave civilization for some time. The expression used to replace underlined portion should have same meaning as underlined portion.'Instigated' means to urge on or incite, so option (3) is correct option for answer. The word 'goaded' as given in option (4) is correct but settle down is not correct and 'Enlightened' is not suitable replacement for 'Instigated'.