The correct answer is option 'A': "I am the Poem of Earth."

Explanation:
The Metaphor is a figure of speech that compares two different things by stating that one thing is another. It is a form of figurative language that adds depth and meaning to the text. In this case, the poet has used a metaphor in the line "I am the Poem of Earth."

- The poet uses the phrase "I am the Poem of Earth" as a metaphor to describe their own identity or existence. They are comparing themselves to a poem and the Earth to highlight their connection with nature and their role in expressing the beauty and essence of the Earth through their words.

- By using this metaphor, the poet emphasizes their deep connection with nature and suggests that their words and art are a reflection of the Earth's beauty, diversity, and experiences.

- The metaphor also implies that the poet sees themselves as a vessel or medium through which the Earth expresses itself. Just as a poem captures and conveys emotions, thoughts, and experiences, the poet sees themselves as capturing and conveying the essence of the Earth through their art.

- Furthermore, the metaphor suggests that the poet's words have the power to evoke emotions, create imagery, and transport readers to the natural world. They are not merely describing the Earth, but embodying it through their poetry.

- Overall, the metaphor "I am the Poem of Earth" serves to emphasize the poet's connection with nature, their role as a conduit for the expression of the Earth's beauty, and the transformative power of their words.

In conclusion, the poet has used the metaphor "I am the Poem of Earth" to highlight their deep connection with nature and their role in expressing the beauty and essence of the Earth through their words.