Which of the following words is derived from Greek?

The word "photosynthesis" is derived from Greek roots. The term is composed of two parts: "photo," meaning light, which comes from the Greek word "phōs," and "synthesis," meaning putting together, derived from the Greek "synthesis," which means placing together. This reflects the scientific process in which plants convert light energy into chemical energy, emphasizing the importance of light in this process.

In contrast, the other options have different etymological roots. "Biography" originates from the Greek words "bio" (life) and "graphia" (writing) but is a compound that combines both Greek and Latin influences. "School" has roots that trace back to the Greek word "scholē," meaning leisure, but it evolved through Latin. "Dialogue" also stems from Greek, combining "dia" (through) and "logos" (word or discourse), but the focus of this question is on the word with a more complete derivation specifically in reference to a scientific context, which is best represented by "photosynthesis."