Janessa was laid off as a photo lab technician because of the lack of customers. she then found a job at a movie rental store, but was again laid off one month later when the store shut down. janessa's bad luck staying employed is most likely due to:

structural unemployment

Explanation:

This is a type of unemployment that is caused by the change of the skills required by the work industry.

You may have the education and qualifications accompanied by the right skills however your skills may no longer be of use due to changes brought by technological changes or competition with the same industry .

A photo lab technician may no longer be needed probably due to the fact that most people no longer use those labs for their photos due to the today's advanced technology there so many way to take photos.

People do no longer go to the rental movie shops since they can now rent movies online and just view instantly and to most that is an efficient method .

Due to all this technology development.

Janessa's skills are becoming irrelevant to the current work industry which is causing her to face structural unemployment.

  b.

there are isolated pockets of farming, generally around rivers and oases, which are used for irrigation.