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.
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. 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.
d. Problem and Solution: it describes a problem and proffers a solution using signal words such as dilemma, solve, problem, etc.
e. Cause and Effect: it gives the relationship between two things or events in which an occurrence of one (cause) leads to the occurrence of another (effect). Signal words such as consequently, because, as a result, therefore, due to, since, etc.
Therefore, this sentence "Because it has to produce its own air (cause), the Martian city will be small (effect)" is written as a cause and effect text structure.
This ultimately implies that, Martian city is small in terms of geographical size or population because has to produce its own air for use.