Answer:
topical.
Explanation:
Text structure can be defined as words used to describe how a writer or an author organizes his or her words in a literary work.
In English language, there are five (5) nonfiction text structures and these includes;
a. Sequence: this type of text structure make use of words such as after, before, finally, next, then, etc., to describe an event in a timely manner or order of time.
b. Compare and Contrast: it used for the comparison of two or more things to show similarities and differences i.e how they are alike and different.
c. Cause and Effect: it gives the relationship between two things or events in which an occurrence one (cause) leads to the occurrence of another (effect). Signal words such as consequently, because, as a result, therefore, due to, since, etc.
d. Problem and Solution: it describes a problem and proffers a solution using signal words such as dilemma, solve, problem, etc.
e. Description (list): this type of text structure list lot of facts or details about a subject, making use of phrases such as more importantly, for instance, for example, etc.
A topical order refers to a way of structuring a text or organizing a speech based on the main topic and dividing it into several subtopics in logical categories (steps).
Hence, the aforementioned main points (subtopics) for an informative speech about the major kinds of fireworks are seen to be organized in a topical order.
In conclusion, a speech or text organized in a topical order has its main points organized as subtopics which are well related with the main topic.