What are the basic activities in each of the four economic activity levels?

Question

My answer: Primary activities involve gathering raw materials such as timber for immediate use or use in the making of a final product. Secondary activities involve adding value to materials by changing their form. Tertiary activities involve providing business or professional services. And Quaternary activities provide information, management, and research services by highly-trained persons.

Answer 1

This site explains these activities a little differently.

http://quizlet.com/7952047/levels-of-economic-activity-flash-cards/

If these explanations are different than your book, by all means, stick with your book's information.

Answer 2

No, these explanations are precisely accurate. However, are you suggesting that my answer requires improvisation?

Answer 3

No. I was just pointing out that different authors and different experts may define things differently.