Aspeech with the specific purpose "to inform my audience how to take pictures like a professional" would most likely be arranged in order.

I believe the answer is: Topical or Chronological order.
Chronological order is the type of arrangement that written in a step-by-step format, where the previous piece of information is crucial for understanding the  next piece of information
Topical order is the type of arrangement that written by stating the problem followed by the justifications.