Final answer:
An analogy for a digital poster is like making a sandcastle due to their similar creative process and ease of replication.
Step-by-step explanation:
An example for an analogy for a digital poster is like making a sandcastle. This analogy is chosen because both involve a creative process where the individual elements are put together in a way to create something visually striking and subject to interpretation. However, much like a sandcastle, a digital poster is not typically a one-of-a-kind creation like a painting or a novel; it can be easily replicated and shared, similar to how someone could recreate a sandcastle design. Digital posters, through the use of digital art software, allow for artistic expression using digital tools and can be easily modified or reproduced like the simpler, temporary nature of building a sandcastle.