Final answer:
The poem 'The Heaven of Animals' is best described as lyrical and plainspoken, blending emotion and simplicity.
Step-by-step explanation:
The poem The Heaven of Animals can be best described as lyrical and plainspoken. When considering the options provided, lyrical poetry is characterized by a musical quality that expresses the poet's feelings and thoughts. Because the poem delivers profound concepts in an uncomplicated manner, it rejects the descriptions of being cryptic or tragic. While complex poetry might offer intricate structures or themes, a plainspoken work typically avoids overly complicated language or form. So, the combination of being both lyrical and plainspoken suits the poem well, indicating that it is both emotionally expressive and easily understandable.