Synthesizing is organizing the information across multiple references and writing about it by theme. Do not confuse synthesis with a summary. These are very different writing processes. A summary is a description of the ideas of one resource. In a literature review, the information presented is a synthesis, not a summary, therefore it is important to understand the difference. 
Post a description of synthesizing information. In your own words, explain what synthesis is and how it differs from summarizing information. 
 Be sure to support specific references to the Learning Resources. Use proper APA format and citations. 
Source
https://academicguides.waldenu.edu/writingcenter/evidence/synthesis