Final answer:
The best representation of the inequality for the availability of reduced movie price tickets for children 13 or under and adults 65 or older is a ≤ 13 or a ≥ 65.
Step-by-step explanation:
The inequality that best represents the statement regarding the availability of reduced movie price tickets for certain ages (a) can be written in two parts to represent children 13 or under and adults 65 years or older. For children, it is a ≤ 13, as they should be 13 years old or younger. For adults, it is a ≥ 65, as they should be 65 years old or older. Therefore, the complete inequality is expressed as a ≤ 13 or a ≥ 65.