Answer :
The secular trend in physical growth is known to be natural experiment which brings out the complex interplay between genes, physiology and environment. The difference in height between generations is known as secular trend in physical growth.
- The secular trend in physical growth is often used to know the size and shape of individuals from one generation to the another.
This trend includes other trends such as increases in height and weight during childhood and adolescence etc.
It is a variable that shows a known pattern within a given period of time.
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