Hi Emma! It seems like you need some help with homework pertaining to prepositions. A preposition is a word that takes control of, and usually comes before, a noun or pronoun and expresses a relation to another word or element in the clause. That sounds sort of complicated, but in reality, these words are the connector words that allow us to understand the position and place of one thing in relationship to another.
Some examples include about, before, beneath, beside, within, outside, near, far...
One way you can go about identifying prepositions is to ask yourself what part of speech each word in the sentence is, until you get to one that must be a preposition.
So, in your first homework question, the sentence begins with "Two troublesome ferrets were playing..." We know that "two" and "troublesome" in that sentence are adjectives that modify the noun "ferrets," and we understand that "were playing" is a compound verb. Then the sentence is modified by the following clauses: "(with the campers' backpacks) (before the pesky animals) (eventually hid the packs) (underneath a large pine tree.) From those clauses, I can notice that "hid the packs" is a verb+noun construction, and all the words "the campers' backpacks," "the pesky animals," and "a large pine tree" are noun + adjective constructions, so there aren't prepositions in those words. I'm left with "with," "before," "eventually," "underneath." I don't want to give you the answer outright-- but from these options, can you pick out the words that meet the definition above?
There is a cute song you can sing to remember some of the prepositions that goes to the tune of yankee doodle, (the link is below). https://www.youtube.com/watch?v=GLmjfJyZ-iM
I hope this helps!