Question

Because the anxiety can be attached to virtually any object or to none at all, generalized anxiety is sometimes referred to as:

Answer 1

Because the anxiety can be attached to virtually any object or to none at all, generalized anxiety is sometimes referred to as:free-floating anxiety. This type of anxiety cannot be pinned to any specific issue.
Nervous thoughts, worrying about specific ideas that may or may not even be related to what you're doing, physical symptoms like jitteriness, shaking, sweating, fast breathing are some of the symptoms of this condition.

Answer 2

The correct answer is free-floating anxiety.

Free-floating anxiety refers to anxiety involving various distinct situations and stimuli such performance based situations, spiders, death, oral presentations, relationships, money, etc. Generalized anxiety is free-floating because anxiety can "float freely" to any area of one's life.