I.) Parliamentary 
Head of state is mainly ceremonial.
Chief executive can be forced out by "no confidence" vote.
Chief executive is chosen by the legislature.
Head of state has very long or life term of office.
The executive and legislative branches are jointly controlled by a ruling party or coalition.
II.) Presidential
Checks and balances hold between the executive and the legislative branches.
Chief executive is elected by the people.
Head of state is chief executive.
 
        
             
        
        
        
Answer:Some individuals may be natural good at maths or may be just smart kids who are good with mathematics
Explanation:Some students may be intelligent or good at maths which means the shoe size will not be the cause of their quantification skills.
A confounding variable refers to another variable that you may have not take notice of but which is very likely to act on the variable you are trying to measure and make that change you are looking for , its an extra variable. It can mess up your experiment and give you result that are not caused by what your projected. They can assume a correlation that doesn't exist and insert bias in your study. For this reason you have to know these variable before you start your research or study in order to avoid them. 
 
 
        
                    
             
        
        
        
Answer:
corn
Explanation:
the product was almost impossible to grow in their area
 
        
             
        
        
        
Answer:
the belief of some Christians that you should wear a cross as a symbol of your faith.
Explanation: