Answer:
1.) Why does menstruation begin?
A.) Period happens because of changes in hormones in the body. 
2.) How long does the menstrual cycle usually last?
A.) the menstrual cycle lasts 21 to 35 days while bleeding between 2 to 7 days
<u>-TheUnknownScientist</u>
 
        
             
        
        
        
They are ineffective against viral infections because viruses can not be treated with antibiotics.
        
             
        
        
        
Answer:
Because it is zoo
Explanation:
B, it is cause I took da testtt
 
        
             
        
        
        
<span>Phase of a writing strategy which involves deciding on the topic and the purpose of the essay is A. prewriting. During prewriting, which is similar to brainstorming, you just want to decide what you want to write about. Here, you may write as many ideas as you can, take some notes, and later on choose which ones you will incorporate in your text, and which ones you will discard. </span>