question: What stage of development differentiates a 4-stage metamorphosis from a 3-stage metamorphosis , notably absent in the latter ?
answer: pupal stage
turker_answer: The pupal stage of development differentiates a 4-stage metamorphosis from a 3-stage metamorphosis , notably absent in the latter .
rule-based: Pupal stage differentiates a 4-stage metamorphosis from a 3-stage metamorphosis , notably absent in the latter .