<span>Life is an adventure
</span>
The author could be referring to a cage to describe the feelings of the person's life. using the word cage to identify the emotions from the person. Maybe the person, the author is writing about feels like he or she is stuck in the circumstances of everyday life referring to a cage. He or she could be dealing with tough situations and they could be feeling trapped like in a cage. The author could be describing the patterns of the person's way of making decisions. which hinders them and causes them to make wrong choices That keeps them stuck in a cage emotionally.
Samuel Langhorne Clemens (Mark Twain) uses a fine humor style which is easily detected in extracts like:
<em>"Thish-yer Smiley had a mare; the boys called the fifteen minute nag(...) for all she was so slow and always had the asthma, or the distemper or the consumption, or something of that kind."</em>
<em>"...And he had a little small bull pup, that to look at him you´d think he warn´t worth a cent(...) his underjaw´d begin to stick out like the fo´castle of a steamboat..."</em>
<em>"...He ketched a frog one day, and took him home, and said he cal´klated to edercate him(...) and you bet you he did learn him, too.</em>
Twain is satirizing several aspects of American life, but specially the country "punks" who tend to speak at length about subjects that are close to them but are really unimportant an nonsensical.
Three They are all pretty un-important to the rest of the story. Why didn't you just google this?
It is correct but you could use words that people would more understand.
If you were referring to groceries or things you buy from the store, you could say:
He left all his items on the bus.
He left all his groceries on the bus.
(<em>Your answer is great this is just a suggestion) </em>