The correct answer is EXTENDED METAPHOR.
Extended metaphor refers to a comparison between two things that are not alike, which continues throughout a series of sentences in a paragraph or in lines of poem. It is also called sustained metaphor and authors usually use it in order to create a clear comparison between two things.
His voice was Raspy from his own lack of sleep.
<span>Achieving egalitarian, or being an egalitarian, is
hard to achieve since not all people want to be in equal footing with everyone.
Egalitarianism, by dictionary definition is the aim for an equality in wealth,
status, etc. Lower density of men means that it is lower than the average
number of a certain population in a certain country.</span>