Answer:
3.page is this that answer
Explanation:
a.1,2,3,4
 
        
             
        
        
        
The first image is the answer.
        
             
        
        
        
The spines of the cactus have several functions, which are the following:
To defend them from possible predators: inside the body of the plants there is a great deal of water; if herbivores could access it, these plants would not survive.
To provide them with shade: it is true that not much, but it is enough so that the loss of water by evaporation is minimal.
Reflect sunlight: many species have white spines.
 
        
             
        
        
        
The advantage of using a binormal nomenclature in the system of classification is it formally names animals of a species of living things by giving a two-part name which either is based on Latin or other languages. One Part is used to classify the genus and the second part of the specific name. An example of this would be Homo sapiens (for humans). 
        
             
        
        
        
True, most drugs have side effects which are usually undesirable to the user.