The main determinant of skin color is melanin
        
             
        
        
        
4.6 million years ago the solar system was a cloud of dust and gas known as a solar nebula, other material that was most likely present was calcium and iron.
 
        
             
        
        
        
Central nervous systems refers to all the nerves within the body that controls the body's activity. It's controls the nerves from the brain to all body parts. It also controls how the brain functions and how we think. The central nervous systems helps us eat, think, move, etc. 
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Answer:
The correct answer is increasing the rate of cellular respiration in mitochondria.
Explanation:
In mammals like humans, the infection causes a rise or hike in the body temperature of an individual up to 2 - 3 degrees Celsius. Infection results in thermoregulation strategies control by the hypothalamus, of the host by immune system transmitted integration signals, hormonal and neuron lead and increase in metabolic reactions by the increase the rate of the cellular respiration takes place in the mitochondria and that elevate body temperature. Mitochondria releases energy in the form of ATP that helps in body temperature as it is an exothermic reaction.
The correct answer is increasing the rate of cellular respiration in mitochondria.