They show all or part of earth.
<u>Explanation:</u>
Maps are the pictorial representation of earth. The people who draw maps are called cartographers and the maps are represented usually as 2D images.  A map of earth gives an idea about the differences in sizes of the countries of the world and various geographical features.
A map usually uses a scale which gives an idea about the relationship between distances on the map and actual distance on earth. Scales can be of different types like verbal scale, representative fraction, graphic scale etc.
 
        
                    
             
        
        
        
The circulatory system transports the nutrients and oxygen throughout the body, and the excretory system will excrete the waste and the body will start to sweat in response to the heat to maintain homeostasis.
        
                    
             
        
        
        
Answer:
Photosynthesis
Explanation:
Atmospheric carbon dioxide is converted to glucose during the Calvin-Benson cycle. This requires the overall reduction of CO2, using the electrons available from the oxidation of NADPH. Thus the dark reactions represent a redox pathway. NADPH is oxidized to NADP+ and CO2 is reduced to glucose.
 
        
                    
             
        
        
        
<span>Most ecological process cannot be observed or studied at the individual level.</span>