Thomas wants to better understand the trends in literacy rates in Baltimore city over the past 50 years. To do so, he reads and analyzes records saved by local high schools. What type of research is Thomas conducting

Secondary data analysis

Explanation: Secondary data analysis is analysis of data that was collected by someone else for another primary purpose. The utilization of this existing data provides a viable option for researchers who may have limited time and resources.

answer; analytical,creative and practical;