The correct answer would be B. "My father" can be replaced with the pronoun "He." Answers C and D are incorrect because the speaker is not the father, and A is incorrect because "His" refers to something the father owns, not the father. Also, you can plug in each pronoun and see which ones sound fluent. Hope this helps! :)
imagery is described as a vivid description that includes details that appeal to the senses. So, in this case " plop" and "mystery" are considered vivid description words
