B. It provides information about why certain measurements are made in an experiment
From experience, to be able to have background research helps in the design of an experiment because it would tell you what is being measured in a experiment. Without the background information, my whole class got lost on what to do until my teacher told us what we had to measure and how we could measure the experiment. 
 
        
                    
             
        
        
        
Answer:
Temperature
Altitude or Elevation
Moisture or water vapour.
Explanation:
 
        
             
        
        
        
The best and most correct answer among the choices provided by your question is The best and most correct answer among the choices provided by your question is the last choice.
<span>
Kingdom Protista is not valid under evolutionary classification because they evolved before any other kingdom, and as such share a most recent common ancestor with each other, as opposed to any other group.</span>
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D Mountain hope this helps
 
        
             
        
        
        
Answer:
It is active transport
Explanation:
because the ions are moving against the concentration gradient