Basically, the P-P chain turns 4 protons into: 1 neutrino, 1 gamma ray, 1 positron, 1 helium nucleus. 
A gamma ray = energy. 
The chain converts hydrogen into helium and makes energy. 
This is all occurring through fusion reactions where 2 protons basically smash into each other. But, it could also be e.g. a proton smashing with a deuterium nucleus. Or, other nuclei smashing together to make something else.
Hope this helps! 
        
             
        
        
        
First blank is barb fish 
And the second blank is newts
        
                    
             
        
        
        
Flora are plant life and fauna are animals
        
                    
             
        
        
        
Answer:
Fibrous Joints. Fibrous joints are held together by strong connective tissue with only a slight capacity to stretch.
Cartilaginous Joints. Cartilaginous joints allow for slight movement and occur where bone ends are covered
Synovial Joints. Synovial joints allow the greatest degree of movement due to their structure.
Types of Synovial Joints. The many synovial joints of the human body enable movement of various types
Explanation:
 
        
                    
             
        
        
        
Answer:
Photoperiodism
Explanation:
The term "photoperiodism" was coined to describe a plant's ability to flower in response to changes in the photoperiod: the relative lengths of day and night. Because flowers produce seeds, flowering is crucially important for the plant to complete its life cycle.