Adult supervision is crucial in both structured and unstructured play to ensure the safety of children. Structured play involves planned activities with rules, while unstructured play is spontaneous and free-flowing. Both types of activities carry risks of injuries without supervision.
- Option (a): Structured play requires supervision but is not the only type.
- Option (b): Unstructured play also requires monitoring.
- Option (d): Video games do not involve physical activities.
Thus, option (c) “For both structured and unstructured play” is correct.
Assertion (A): The sum of the first fifteen terms of the AP $ 21, 18, 15, 12, \dots $ is zero.
Reason (R): The sum of the first $ n $ terms of an AP with first term $ a $ and common difference $ d $ is given by: $ S_n = \frac{n}{2} \left[ a + (n - 1) d \right]. $
Assertion (A): The sum of the first fifteen terms of the AP $21, 18, 15, 12, \dots$ is zero.
Reason (R): The sum of the first $n$ terms of an AP with first term $a$ and common difference $d$ is given by: $S_n = \frac{n}{2} \left[ a + (n - 1) d \right].$