Passage Summary: The brain's emotional center has stronger physical wiring going to the thinking center than the thinking center has going back to the emotional center, so emotions must be more powerful than thoughts.

Conclusion: The amygdala has a more significant impact on the cortex than the cortex has on the amygdala.

Reasoning: The physical neural pathways traveling from the amygdala to the cortex are more developed than the pathways traveling from the cortex to the amygdala.

Analysis: This Sufficient Assumption question features a classic 'Gap' between physical structure and functional influence. The author assumes that the level of 'development' in a neural connection is the sole or primary factor determining the 'influence' one region has over another. To make this conclusion follow logically, we need an assumption that explicitly equates the degree of pathway development with the degree of influence. Without this link, it's possible that a 'less developed' connection could still be more efficient or powerful.