Nacho sounds like not yo meaning not your cheese
Contextual clues give hints that you can piece together like a puzzle. They help reveal things or drop subtle hints to almost tease the reader. They can also help you understand something such as a phrase or new words.
(You use them a lot like context clues but these are broader and more vague.)
A noun is a person, place, or thing
I think A would be your best bet but im not 100% sure, space is a place and everyone I guess would be considered a person/people
Can we get a clearer picture please
She supports her claim be explaining how beetles recycle nutrients and show past the beetle is important