Final answer:
The left and right arrows indicate the direction of software deployment, with promotion and back-promotion referring to the movement of code through stages or a reversal of that process, respectively. Option (a) is correct.
Step-by-step explanation:
The student's question refers to a graphical representation used in software deployment processes and indicates a multiple-choice format. The left and right arrows depict the direction of the deployment. When referring to deployment, the terms typically used are promotion and back-promotion, where promotion often indicates moving code forward through stages (e.g., from development to testing, and then to production), whereas back-promotion could refer to a reverse process. Therefore, option a. Arrows, Promotion, Back-Promotion, seems to be the most appropriate choice, as it aligns with common software deployment terminology where the arrows indicate the direction of the deployment action through the environment stages.