Sky is a noun. It can be use as a subject.
determiner
it could be referring to the color or like when a tornado is coming and the sky is a bright orange.
The sun is in the eastern part of the sky in the morning as it rises in the east and sets in the west.
A sky metaphor is a figure of speech that compares something to aspects of the sky, such as clouds, the sun, or the stars, to convey a particular meaning or emotion. It is often used to describe vastness, beauty, clarity, or mystery in a poetic or expressive way.
Sky is a noun. It can be use as a subject.
Rainstorm is a noun. Nouns are people, places, and things.
The word lightning is a noun. It is a flash of light in the sky produced by electricity within a cloud.
The word rainbow is a noun. A rainbow is a multicoloured arch that appears in the sky.
metaphor
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
what part of speech is beneath
adverb
The part of speech for "explicit" is an adjective.
The part of speech for "lecturer" is a noun.