Answer:
Secondary analysis
Explanation:
Lydia is re-analysing already collected data by other researchers, which is referred to as secondary analysis method.
Secondary analysis is the re-analysis of either qualitative or quantitative data already collected in a previous study, by a different researcher normally wishing to address a new research question. 
 
        
                    
             
        
        
        
Answer:
i believe it is the last choice
Sugar is solute and water is solvent.
Explanation:
 
        
                    
             
        
        
        
Answer:  When the carbon dioxide concentration goes up, temperature goes up. When the carbon dioxide concentration goes down, temperature goes down.
Explanation: