The correct answer is 1. Comparison-contrast
Step-by-step explanation:
In writing, the term "text structure" refers to the way information is organized in a text, this structure is related to the topic of the text and the purpose the writer has with it. In the case of comparison-contrast structure, the author mainly aims at analyzing two or more elements, subjects or topics of the same category and finding the features or ideas both element share (similarities) and those that made them different (differences). This can be developed by using "subject by subject" structure which means the sub-ideas of one element or subject is first analyzed and then compared and contrasted with the other or by using "point by point" structure which analyzes the sub-ideas of both subjects at the same time. Considering this, it can be concluded from the options given the text structure that focuses on the similarities and differences between two topics is the "comparison-contrast".