When a writer focuses on using font size and spacing that increases the readability of the text, he/she is focusing on
a. conventions.
c. word choice.
b. sentence fluency.
d. presentation.

D. Presentation

Word choice, sentence fluency, and conventions are all a matter of grammar. However, using proper spacing and font sizes helps the writer and the writing itself seem more presentable to the audience or reader, thus making the answer D. Presentation.

Answer and explanation:

an interrogative pronoun is a pronoun which is used to make asking questions easy. there are just five interrogative pronouns. some examples of who-form interrogative pronoun are as follows

who is that? who was driving the car?   who is going to take out the trash? who do you think will win the playoff game?