Play is an unstructured physical activity primarily aimed at enjoyment and fun. It differs from games or sports, which may have rules and competitive goals.
- Option (a): Games involve structured activities with objectives.
- Option (b): Sports emphasize competition and skill.
- Option (d): Athletics includes organized and competitive physical activities.
Thus, option (c) “Play” focuses purely on fun.
In the adjoining figure, $\triangle CAB$ is a right triangle, right angled at A and $AD \perp BC$. Prove that $\triangle ADB \sim \triangle CDA$. Further, if $BC = 10$ cm and $CD = 2$ cm, find the length of AD.