Final answer:
When Meg tessers, her body undergoes physical and sensory reactions including compression, disorientation, and physiological changes.
Step-by-step explanation:
Tessering is the act of folding space and time to travel instantly from one place to another. When Meg tesses, her body experiences intense sensations, including a feeling of being compressed or stretched. She may also experience disorientation, a sense of weightlessness, and visual distortions.
Additionally, Meg's body may undergo physiological changes, such as increased heart rate and adrenaline release, similar to the fight-or-flight response. These reactions occur due to the tremendous amount of energy required for tessering. It is important for Meg to learn how to control and manage these reactions to ensure her safety and well-being during tesser journeys.