Answer:
True.
Step-by-step 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.
A causal speech format is a type of speech in which the speaker uses a cause and effect relationship to express his ideas or communicate with the audience. Thus, it's a speech that comprises of two (2) main points: cause of a problem and the effect of the problem.
On the other hand, a problem-cause-solution format is a type of speech which involves describing a problem, identifying the probable cause of the problem and lastly proffering a solution to the problem.
In view of the above definitions, we can infer or deduce that a causal speech format is virtually identical to a problem-cause-solution format because in both organizational structure, the speaker highlights or identifies the cause of a problem.