Concept:An elegy is a poem that mourns the death of someone or laments a loss.Explanation:The poem describes a person who cannot be woken anymore.Lines such as “this morning and this snow” suggest coldness and death.The speaker wishes the sun could revive him, but he is “too hard to stir.”The words “clay grew tall” and “Earth’s sleep” also point to burial and death.The tone is sorrowful and reflective, which is typical of an elegy.It is not a sonnet because it lacks a regular rhyme scheme and does not follow iambic pentameter.Answer:C. an elegy