What are the following items?
titles
headings and subheadings
overviews
questions and exercises
a.
reading strategies
b.
parts of a textbook
c.
parts of an essay
d.
types of questions

parts of a textbook

These are all parts of a textbook. The titles tell you the different topics each sections of the textbook contains. The headings and subheadings further breakdown each of the topics into different parts or elements. This helps the reader to better understand the organizational structure of the textbook which in turn aids in comprehension. Overviews help the reader to preview the information that is to come in the text. The questions and exercises help the reader to synthesize, analyze, and apply the learned content.

the answer is:

when will (v) the books (n) be (v) due?

nouns refer to people (other than pronouns), places and things, whereas verbs describe actions and are usually part of the predicate of a sentence. finally, pronouns can work as nouns and identify the participants in speech.

in the example sentence, "will" is a verb part or auxiliary verb, "be" is an infinitive verb and "books" is a plural noun.

b

explanation: