Answer:c
Explanation:
Have a common understanding in the classification of organisms 
 
        
             
        
        
        
The five main external factors that must be present or provided t sustain life are:
1. Water 
2. Oxygen
3. Food
4. Atmospheric temperature 
5. Atmospheric pressure
<span>The human body needs water, food and oxygen in order the body functions to work properly.
</span>Not every temperature is temperature at which the human can live. For example: we can not stay alive long period of time at temperature of 60 degrees Celsius. 
        
             
        
        
        
The messenger RNA is a single-stranded intermediate
molecule that transfers the genetic information from DNA to the cytoplasm,
which is used as a template to assemble the chain of amino acids that form a variety of polypeptides. Therefore, mRNA is the blueprint for
protein synthesis, which is read according to the genetic code during gene
expression.
 
 
        
                    
             
        
        
        
Underneath the right side of the liver, the gallbladder is a pear-shaped organ.
<h3>
What is the function of gall bladder?</h3>
Its primary function is to gather and concentrate bile, a digestive fluid made by the liver. The gallbladder is where bile is kept after the liver produces it. The gallbladder receives a signal from the stomach when you eat. Bile is released from the gallbladder when it contracts, and it travels through the gut via the major common duct. Bile combines with the food there and aids in digestion.
When the gallbladder is removed from a healthy person, there are rarely any obvious health or digestive issues, though there is a slight chance of diarrhea and fat malabsorption.
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