The of a piece is the author’s reason for writing it.
a. perspective
b. style
c. tone
d. purpose

The fourth alternative is correct (D).

The act of writing requires a fundamental element that inspires the writer, this element is the purpose.

Purpose is associated with the purpose and meaning of a literary production, the author of a play uses his literary sensibility to write something that has meaning, something that he believes, that is, something that has a purpose.

a) he encouraged islamic schools to introduce greek texts.

d) he invited greek scholars to teach their texts to the locals.

explanation:

the author motivation is to show the power of animal-human relationships.