Answer: "from the plane" is the prepositional phrase
Explanation: A prepositional phrase is a group of words containing a preposition, a noun or pronoun object of the preposition, and any modifiers of the object.
Some of the most common prepositions that begin prepositional phrases are to, of, about, at, before, after, by, behind, during, for, from, in, over, under, and with.
For example: "Mark needs to be on time for his business meeting." "On time" is the prepositional phrase.
Therefore, "from the plane" is the prepositional phrase in the sentence.
The subordinate clause starts with a subordinating conjunction and contains the entire dependent clause. Because is a subordinate conjunction and makes the clause dependent because you need to know what's next. Hopefully answer choice D has all the right pieces. The main clause is "it is revolutionizing medical research". This clause is a complete idea by itself and is not a subordinate clause.
