Final answer:
The analogy strategy involves comparing two dissimilar situations or things to clarify an unfamiliar concept, and it's sometimes viewed as a weak rational appeal. The comparison and contrast strategy examines similarities and differences between subjects with a common thread.
Step-by-step explanation:
When using the analogy strategy, the writer compares two unlike situations or things. This particular strategy can sometimes be considered the weakest form of rational appeal. An analogy is often used to clarify or explain an unfamiliar subject by highlighting similarities with a more familiar subject, regardless of their overall differences.
Analogy paragraphs typically start with a statement of comparison and proceed with reasons, explanations, or analyses of their similarities. Comparison and contrast is another related strategy where writers analyze and examine the similarities (comparisons) and differences (contrasts) between two or more subjects.
While this strategy provides readers with the means to evaluate and analyze subjects, it's important to ensure that the subjects being compared have a significant common thread, and are not overly obvious in their differences or similarities.