There is competition among species when they jostle for scarce resources.
<h3>What is competition?</h3>
The term competition has to do with a situation in which members of the same species scramble for scarce resources.
The following are the definitions of the types of competition;
- interference competition - An individual directly interacts and changes the way other individuals attain resources.
- apparent competition - Individuals do not compete directly for resources, but are prey for the same predator.
- exploitation competition -  Individuals interact indirectly while competing for common resources.
Learn more about competition among organisms:brainly.com/question/13775651
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Saline solutions have the same or close to the same amount of salt as our blood does, so we get the amount of salt needed for our bodies. During blood loss, you lose the salt you need, so they're basically adding it back in with the saline solution, making your electrolyte balance go back to normal level. It also gives us the right amount of water to keep us hydrated. 
        
             
        
        
        
The answer is C because if a doctor only tested new medication on one person then gave it to many other people with the same disease there might have been a mistake and could kill people
        
             
        
        
        
A Lipid because it's a fresh osmosis they are always active