Answer:
The answer is letter B. demonstration.
Step-by-step explanation:
A demonstration speech (or demonstrative speech) is a type of informative speech. As its names suggests, its purpose is to teach the audience the steps to do something or how something operates by not only speaking, but also by showing how it is done. This sort of speech is commonly found, for example, in tutorial videos. As the speaker mentions each step, he/she also visually demonstrates how it is done.