The correct answer is D. 41253.
The first word, “leads,” is a verb. The second word, “dog’s,” is a possessive noun. The third word, “life,” is a noun. The fourth word, “he,” is a pronoun. The fifth word, “a,” is an article.
The correct order of the words is “he leads a dog’s life.” This means that the person referred to by “he” is living the life of a dog. This could mean that he is living a simple, carefree life, or it could mean that he is living a life of obedience and servitude.
The other options are incorrect because they do not make sense in the context of the question. Option A, “12543,” would mean that “a dog’s life leads he.” This does not make sense because a life cannot lead a person. Option B, “12453,” would mean that “a dog’s life he leads.” This does not make sense because the word “he” comes before the word “life,” which is incorrect grammar. Option C, “41523,” would mean that “he a dog’s life leads.” This does not make sense because the word “he” comes after the word “life,” which is incorrect grammar.