Task-analysis can be carried out in relation to -

Task analysis can be defined as the process of identifying the tasks of a particular job in a specific organizational context by analyzing activities, establishing performance criteria, determining required competencies, and analyzing any discrepancies uncovered by this process. 
 Key Points

• It can be used for teaching any task from any area of development and it can be used by any person who is training and teaching the child -be it a parent, teacher, family member, or community worker. 
•  Its primary purpose is to simplify the learning of a particular task. 

Important Points​ It can be carried out in relation to:

• Content of the books
• Job for providing employment
• Skills to be learned

Thus, it is concluded that all of the above is the correct answer.