Answer: Option A 
Explanation:
Rheumatic fever is a disease which affects the joints of the body. It also affects the skin and brain of the body.
Rheumatic fever symptoms is very similar like the common cold and fever. This fever can also occur after the throat infection which is caused due to group of bacteria known as Streptococcus.
It has the ability to cause sore throat, scarlet fever and  infections in different parts of the body.
Rheumatic fever takes places if the strep throat and scarlet fever is not treated on time.
 
        
             
        
        
        
Answer:
mass and volume
Explanation:
Matter is anything that has mass and takes up space
 
        
                    
             
        
        
        
Hello! 
The type of polymer that is made by bonding an alkene to one or more alkanes or alkenes is called addition polymer
Addition polymers are those whose polymerization reaction doesn't produce low molecular mass compounds but the bonding of molecules one after the other. Such a reaction implies that there is a rupture in the bonding between monomers (the building blocks of the polymer) to allow the formation of a chain. 
Bonding an alkene to one or more alkanes or alkenes is an example of an addition polymerization. 
Have a nice day!