Conjunctive adverbs are adverbs which connect two complete thoughts; that is, they link up two independent clauses or sentences. Each of the clause can stand on its own as a complete sentence and the first clause is often followed by a semi colon. Examples of conjunctive adverbs are: also, although, besides, anyway, namely, likewise, instead, later, etc.
The sentence given in the question above is this:
Justin was hungry for something; ....................., he wanted strawberry.
The correct conjunctive adverb for the blank space is NAMELY.