Which person is undergoing the fastest rate of growth?

a a 6-month old boy incorrect answer
b a 9-year-old girl incorrect answer
c an 18-year-old boy incorrect answer
d a 25-year-old woman

A six month year old boy would be going through the fastest rate of growth. 

A six month boy would be growing fastest

Smoking damages the respiratory system by inhalation of a foreign substance, that is absorbed and residue is left behind on our lungs sponge like substance. the gas that is inhaled also increase your blood pressure and dilates your blood vessels. also the process of inhaling and exhaling the smoke it causes irritation to the throat and mouth. smoking can cause lung cancer and other respiratory and circulatory diseases.