Question

consider the mechanics of the pinhole camera: light passes through a small hole, resulting in a focused projected image. a ray diagram reveals how this ______ the holes small size restricts light to a single ray, all light passing through the hole can only arrive at a single destination, eliminating diffraction and ensuring a clear image. which choice completes the text so that it conforms to the conventions of standard english? a) works because b) works. because c) works, its because d) works: its because

Explanation:

• Option A: "works because" creates a complex sentence where "how this works" is a noun - clause (the object of "reveals"), and "because" introduces a subordinate clause explaining the reason. This is grammatically correct.
• Option B: "works. Because" is incorrect. A period after "works" makes "Because..." a sentence - fragment as "Because" clauses cannot stand alone as independent sentences.
• Option C: "works, it's because" is a comma - splice. Two independent clauses ("this works" and "it's because...") are wrongly joined by a comma.
• Option D: "works: it's because" is incorrect. A colon should be used to introduce an explanation, but "it's because" is not a proper independent - clause explanation in this context (the structure is convoluted compared to option A).

Answer:

A. works because