Meat and other types of tough food
        
                    
             
        
        
        
C. Experimental
Explanation - The cause and effect of a process would be studied in experimental investigations. However, in descriptive studies, relationship between the factors are not studies rather the detail of the process is studied. In comparative investigation, several factors are compared and its effects are analyzed. 
In experimental investigations, experiments are carried out based on the hypothesis and then it is validated accordingly. Validation is a must to prove and disprove the hypothesis. Therefore, experimental data and hypothesis are related.
 
        
             
        
        
        
Answer:
Table Sugar!
Explanation:
Sucrose, also known as common sugar, is used by humans to sweeten foods. Yummy ice cream, making coffee a little less strong, there are lots of things you can use sugar for! It is composed mainly of glucose and fructose.