The correct answer for this question would be the third option. The statement that correctly compares the benefits of two forms of renewable energy is this: <span>Solar power and wind power are both clean energy sources. They are considered as clean and renewable energy because both are natural energy and are always available. Hope this answer helps</span>
        
                    
             
        
        
        
The major histocompatibility complex (MHC<span>) is a set of cell surface proteins essential for the acquired immune system to recognize foreign molecules in vertebrates, which in turn determines histocompatibility. ... The human </span>MHC<span> is also called the </span>HLA<span> (human leukocyte antigen) complex (often just the </span>HLA<span>).</span>
        
             
        
        
        
Answer:
H+
Explanation:
Hemoglobin is the major protein of red blood cells. It has many exposed amino groups and carboxylic groups at its surface. These NH3 and COOH groups serve as weak acids and bases respectively and allow hemoglobin to serve as a buffer to maintain the pH of the RBC cytoplasm. 
As the exposed amino groups of hemoglobin protein bind to the H+ ions, the free H+ concentration of the cytoplasm of RBC is reduced leading to a buffer action to maintain the pH.
 
        
             
        
        
        
Explanation:
this is mainly because when water evaporates, it leaves behind minerals, and even pollutants and goes up as clean water