Question

(a) what does chemo mean? (b) what does photo mean? (a) chemical (b) light (a) light (b) chemical

Explanation:

• The prefix "Chemo -" is related to chemicals. For example, in "chemotherapy", it involves the use of chemical substances to treat diseases.
• The prefix "Photo -" is associated with light. Words like "photograph" (using light to capture an image) and "photosynthesis" (process in plants that uses light) illustrate this.

Answer:

A. Chemical
B. Light