The question refers to "these" visual aids. In such circumstances would it be too much to expect that you make sure that there is something that "these" can refer to?
DIAGRAMS
diagrams ( :
Diagrams
One of the best ways that I learn is through Powerpoint or Prezi! You can post pictures or even videos on these programs! :]
Diagrams.(: check out fyrnd boiz dey go hard yooo.(:
Diagram
breaks down complex structures to simpler ones
AACTA Award for Best Visual Effects was created in 2006.
The 2012 Academy Award for Best Visual Effects went to "Life of Pi."
They help the speaker clarify complex ideas for the audience -Apex
opinions come in for who is best
Studies indicate the best way to control the temperature of the endothermic reaction in a mixed reactor is through making adjustments to the coolant temperature. There processes are highly complex.