Daniel is editing a Microsoft Word 2016 and selects the text shown in the figure. When he presses and holds the mouse button pointing over the selected text and moves the pointer slightly, he notices the vertical line that Box 1 is pointing to in the figure. Which of the following does the vertical line indicate? 
Definitions:
James-Lange Theory
An idea that posits emotions arise following bodily reactions triggered by events.
Autonomic Failure
A condition where the autonomic nervous system does not function properly, affecting bodily functions such as blood pressure, heart rate, and digestion.
Heart Rate
The number of heartbeats per unit of time, generally expressed as beats per minute (BPM), indicating cardiovascular health and activity level.
Physiological Changes
These are changes in the body's normal biological functions, which can result from various causes, including stress, exercise, or disease.
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