The advantage of using ppt in teaching mathematics is -

Some advantage-of-a-teaching-aid items offer more than one option that describes something genuinely true about the aid; the exam's answer key still credits one option as the intended advantage, based on the standard teaching-aptitude material the exam draws from, usually the option naming the overarching classroom benefit rather than a narrower presentational detail.

Facilitating an effective way of communication names that overarching benefit: combining text, diagrams, and worked steps on one screen lets a teacher convey a mathematical idea to students more clearly and engagingly than speaking or writing alone in the same class time. This is the option credited by the source material for this question.

• Presenting outlines of information in a sequential manner does describe something PPT slides genuinely do, but it names a narrower presentational detail rather than the overarching classroom benefit the exam's key credits; a printed handout or a blackboard list can sequence points the same way, so a sharp reader may find this option debatable, but it is not the option the source key gives for this item.

• Create a huge gap between reality and perception names a real risk of over-relying on visual aids, where students grasp the image but miss the underlying concept; this is a limitation, not an advantage.

• Choose to create your own design or use existing one is a customization option within the software itself, unrelated to any change in how well students learn.

So the option matching the source key, the one naming the overarching classroom-communication benefit, is the answer recorded here; a careful reader may note the sequencing option also describes something true about PPT, but it is not the option credited by the key.