The element necessary to complete the sentence above is D) independent clause.
You already have a subject (I) and a predicate (save), so these two are not needed, nor is a prepositional phrase. But you need an independent clause, because this is a dependent clause which cannot stand on its own. For example:
If I save enough money, <em>I will buy a car. </em>
Eliza Doolittle<span> i think...................</span>
What sentence? did you forget to put a picture?
Answer: distant vision.
Explanation: Tele- distant, Vision- able to see something.