Any alloy of iron mixed with a small amount of carbon to increase its strength or malleability is called Steel. 
<h3>Why we use alloy ?</h3>
The most common reason for alloying is to increase the strength of a metal. This requires that barriers to slip be distributed uniformly throughout the crystalline grains. On the finest scale, this is done by dissolving alloying agents in the metal matrix (a procedure known as solid solution hardening).
It increases tensile strength also. Hardness, hardenability and resistance to wear. It decreases tendency toward scaling and distortion. It increases the rate of carbon-penetration in carburizing. 
<h3>How to make Alloy? </h3>
Alloys are made by mixing two or more elements, at least one of which is a metal. This is usually called the primary metal or the base metal, and the name of this metal may also be the name of the alloy. 
To know more about Alloy please click here: brainly.com/question/716507
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<span>Malnutrition. Malnutrition refers to deficiencies, excesses or imbalances in a person's intake of nutrients. The baby is not getting a balanced diet to meet its bodily needs, and that's why the baby is at high risk of the mentioned above. If a child is undernourished, especially below 2 years of age, it may result in permanent problems with physical and mental development, and since early childhood is an important period for cognitive, behavioral, and physical development, a nutritious diet is the most important factors for ensuring a child reaches optimal development.</span>
        
             
        
        
        
Answer: salt
Freshwater is defined as having a low salt concentration, usually less than 1%.
Explanation:
Freshwater refers to the bodies of water that contain very low levels of dissolved salts. So, freshwater are unique for their low salt content (about 0.5% of salt) compared to the sea water with high salt content.
Examples of freshwater include rivers and spring
 
        
                    
             
        
        
        
Cell membrane would be corr3eect