How can speakers build logos while speaking on a subject

Logos is an appeal to logic. A really good way to build this is to include statistical/ scientific data in the speech. The speech also needs to be very logical and include detailed reasoning for all of its points.

you need need more details so we can understand what your asking us.

a. to introduce the audience to important characters .

b. to inform the audience where the story takes place .

e. to lay out specific details about different plot points.