The right options are; makes food for all organisms, adds oxygen to the atmosphere, is a source of medicines and fibers, is a source of building materials and it provides animal habitat.
Photosynthesis is a process by which green plants and some other autotrophs use light energy in chloroplasts to generate carbohydrates (food) from carbon dioxide and water while oxygen is being released as a by-product. Photosynthesis is essential to all living organisms on earth because it is the main source of oxygen in the atmosphere. Photosynthesis provides animal habitat, it provides food for all organisms (directly for plants and indirectly for animals). Plants and trees produce their foods through photosynthesis and are used as medicines and fibers, and as building materials.  
 
        
                    
             
        
        
        
There are 3 fitness principles: overload, progression and specificity. 
According the principle of overload in order to improve, athletes must continually work harder as they their bodies adjust to existing workouts. This <span>is the basic sports fitness training concept.</span>
In the 3-week workout routine that incorporates the fitness principle of overload several things must be satisfied:loads should be gradually and progressively increased , the training loads should be  planed and monitored, the workout routine should include workouts that allow recovery (stretching for example), competition should be involved, and very important muscular failure should be avoided.
        
                    
             
        
        
        
It is called Summer Solstice.
        
             
        
        
        
Answer:
Explanation:
Consider, for example, “shot noise” in a digital camera. ... Defining Extrinsic versus Intrinsic Noise in Transcription ...