The answer is: most famous feature.
An adverbial phrase can contain one or more words which function as an adverb, being the adverb the head word of the phrase. Thus, they modify an adjective, a verb or another adverb. In the example sentence, the word most is the adverb, which means to the greatest extent.
The phrase "its ring system" is a noun phrase, "of ice particles" is a prepositional phrase, and "that is made" is a defining relative clause.
Bradbury repeatedly uses the color gray to describe the parlor. He chooses this color to show the depressing nature of the parlor. He sees the viewing parlor as a way for people to turn off from experiencing life and the world around them. All the vibrancy of life is drained out.
In contrast when he talks about the park he uses the color green. Green symbolizes life, growth, vitality. He's showing that society has become dull and miserable inside their homes instead of alive and joyous in the world.
This is a correctly written piece of dialogue. It is both grammatical and conveys meaning which leads us to believe that it is correct.
<span>They both wanted to become a light weight boxing champion of the world.
</span>
Outrageous is spelled correctly.