Topic and purpose and attention-getting material are all components of the
a.
information
c.
organization
b.
voice
d.
introduction

Topic and purpose and attention-getting material are all components of the : D. introduction

in the introduction, the writer most commonly use it to attract the attention of potential readers that have their interest align with the study
So, a writer usually write what study that he want to conduct , how they're doing it, and why they're doing it within the introduction part.