Answer:
steadily
Explanation:
As an adverb steadly means firmly fixed, supported, or balanced; not shaking or moving which can helps understand the word perpetual.
The phrase from the sentence which helps define the word "perpetual," that is, the context clue is "goes on steadily," as is further explained below.
We use the term context clue to refer to any information in a text that helps us find out the meaning of a new or strange word. In the speech we are analyzing here, we need a clue for the definition of "perpetual."
"Perpetual" is an adjective used to talk about something that is is either unchanging or that occurs repeatedly. Therefore, the best context clue for it is "goes on steadily," referring to something that happens again and again.
Learn more about context clues here:
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