Which term corresponds with "light" in Greek vocabulary?

The term that corresponds with "light" in Greek vocabulary is "photo-." This prefix is derived from the Greek word "phōs," which means light or brightness. It is commonly used in several contexts within the sciences and other fields to denote concepts related to light. For instance, in words like "photography" (writing with light) or "photosynthesis" (the process by which green plants use sunlight to synthesize foods), the prefix "photo-" clearly connects to its meaning related to light.

The other options do not relate to light. "Macro-" refers to something large or long, "hemi-" signifies half, and "hypo-" means under or beneath. Therefore, the correct answer is rooted in the established relationship between the prefix "photo-" and the concept of light in both everyday language and scientific terminology.