Instructional aids may be used:

The choice that points out the use of instructional aids to clarify the relationships between material objects and concepts is accurate because instructional aids serve as tools that enhance understanding by providing visual, auditory, or tactile references. These aids can bridge the gap between abstract ideas and tangible examples, making it easier for learners to grasp complex concepts. For instance, models, diagrams, and simulations can visually represent relationships, thereby facilitating deeper comprehension and retention of the material.

In contrast, the other aspects listed do not align with the primary role of instructional aids. Covering broad subject areas may be a goal of instruction but does not directly address the purpose of aids. Claims about adding time to instruction overlook the efficiency that aids can often bring. Lastly, focusing solely on theoretical concepts neglects the significance of practical application and the interactive learning that aids often promote. In this context, instructional aids are best utilized to clarify and illustrate connections, enriching the learning experience.