Analysis
Analysis emphasizes the breakdown of the materials into its constituents or related parts and of the way those part may be organized and relevant to each other. Analysis also may be directed at the techniques and devices used to convey the meaning or to establish the conclusion of a communication.
Read Key Word: Analysis in THE BLUE BOOK by Callison and Preddy, 275-278.
Identifying similiaries and differences is an example of breaking down ideas and finding common underlying structures.
Read Identifying Similarities and Differences from NETC.