Indira, a third-grade teacher, frequently suffers from dizziness, heart palpitations, muscular tension, and fatigue. she is also continually agitated and unable to relax outside the classroom, but she cannot pinpoint a reason for her problems. her behavior is most indicative of a(n)

I believe the answer is: generalized anxiety disorder.

generalized anxiety disorder refers to a form of psychological disorder that make patients display excessive worry/concerns about a disaster that would happen to them, even though the patient's concern would be seem as an exaggeration/unlikely to happen by normal people.