Concept:Individual differences arise from the combined influence of heredity and environment, not from either factor alone.
Explanation:Heredity provides the inborn potential and genetic limits, such as IQ range, instincts, and traits passed from parents.
Environment determines how much of that potential is actually developed, including mental, social, and behavioural characteristics.
For example, heredity sets the upper and lower limit for intelligence, while environment decides the exact position within that range.
Neither heredity nor environment works in isolation; their constant interaction shapes each person's unique traits, abilities, and personality.
Thus, differences in height, appearance, behaviour, and reaction speed all stem from this interplay.
Answer:Option B – Due to the interplay between heredity and environment