GIVEN sentence, the use of the personal pronoun 'him' is incorrect.A personal pronoun refers to a SPECIFIC person or object or group of things directly.The reflexive pronoun 'himself' should be used in place of the personal pronoun 'him'.A reflexive pronoun expresses a noun when the subject's action affects or influences the subject itself. Hence, the correct answer is OPTION 2.Correct Sentence: He SPOKE slowly in order to make himself clear.