Which of the following states the poet's perspective in the poem?

The answer you might be looking for is Imagery.
Imagery, in a literary text, is an author's use of descriptive language to add depth to their work.
There are seven major types of imagery, each corresponds to a sense, feeling, or action:

Visual imagery applies to graphics, visual scenes, pictures, or the sense of sight in general. 

Auditory imagery applies to sounds, noises, music, or the sense of hearing. (Another form might be onomatopoeia).

Olfactory imagery applies to scents or the sense of smell.

Gustatory imagery applies to flavors or the sense of taste.

Tactile imagery applies to physical textures or the sense of touch.


Not so popular:
Kinesthetic imagery applies to movements or the sense of bodily movement.

Organic imagery or subjective imagery applies to personal experiences of a character's body, including emotion and the senses of hunger, thirst, fatigue, and pain.