Which us region historically has been dependent on the entertainment, software, and aerospace industries as part of its economy?

This would be the north as back during the reconstruction era, the north (Tom Watson's group) wanted to be more efficient and industrialized.

Reference: Georgia Studies Unit 6 notes

"The west coast , California , Nevada and Organ" has been dependent on the entertainment, software, and aerospace industries as part of its economy

Hope this helps!

Its decreasing because of illnesses