Answer: B) Outside to inside.
Step-by-step explanation: an analogy is a comparison between one thing and another, usually with the purpose of explanation or clarification, this comparison is based on one similarity or difference between specific features of two things. The words "downside" and "upside" have the relationship of being the opposite sides of something (spacial). From the given options, the words that have the same relationship are the corresponding to option B: outside to inside.