Answer:
b. organizational material.
Step-by-step explanation:
Words and phrases such as "in addition," "in other words," and "therefore" are examples of organizational material. These terms are used to provide structure and coherence to a piece of writing or speech. They help in organizing ideas, indicating relationships between different points or arguments, and guiding the flow of information. Verbal transitions, on the other hand, refer to the use of words or phrases to smoothly transition between different parts of a speech or conversation.