I,3,4,7 hope this will help
        
             
        
        
        
Answer:
hydrogen and oxygen combine explosively in a single raction 
Explanation:
The reason is Molecules of hydrogen react with oxygen violently to break the initial molecular bonds and form new one between the atoms of the two elements. The reaction results into an explosive release of energy and the production of water because the products of the reaction are at a lower energy level
 
        
             
        
        
        
Answer: To perform photosynthesis, plants need three things: carbon dioxide, water, and sunlight.
 
        
                    
             
        
        
        
This answer is best suited to say that the Broca's area is responsible for speech production and function. Moreover, comprehension is done in the Wernick's area. Thank you for your question. Please don't hesitate to ask in Brainly your queries.