Observe the chart and graph given in Fig. 10.3 carefully and answer the following questions.

(a) Which of the line represents the height of boys?

(b) Which line represents the height of girls?

(c) What is the difference between the pattern of increase in the height of boys and girls?

(d) Is this pattern true for each individual?

(a) The red line represent the height of boys as boys height grows gradually up to 18 years and their % of full height is less as compared to girls.

(b) Blue line represent girls height as their % of full height for a particular age is more as compared to boys.

(c) Girls grow faster initially as compared to boys. The girls % of the full height at particular age group is more as compared to boys. But both attain maximum height by 18 years of age.

(d) No, the pattern is not true for each individual. Some grow very fast initially then they stop. But some grows gradually and attain maximum height by 18 years of age.