Instructional purpose is concerned with identifying:

Instructional purpose is the objective or goal set by an educator that they wish to achieve through their teaching. It's a clear statement regarding what the students should be able to do, understand, or demonstrate after completion of the teaching process. 

Key Points
In this context, the 'instructional purpose' would be meant to assist students in identifying and acquiring the specific knowledge necessary for the subject at hand.

• This could include factual information, theories, principles, or concepts that are vital to understanding the subject.
• Here, "knowledge" refers to the theoretical or practical understanding of a subject. It is the information, facts, or skills acquired through experience or education.

Hence, we can conclude that option 1 is the correct answer.