Final answer:
The statement that during vortex breakdown, the tornado contracts and an updraft dominates the center of the vortex is false; while tornadoes contract to increase velocity, an updraft domination is not aligned with the typical dynamics of a tornado.
Step-by-step explanation:
The question pertains to the behavior of tornadoes during vortex breakdown. Specifically, it asks whether it is true or false that during vortex breakdown, the tornado contracts and an updraft dominates the center of the vortex. The information provided indicates that the eye, or center, of the tornado is the center of rotation and that winds are actually weaker at the eye due to tangential velocity being inversely proportional to the square of the radius of curvature.
However, it does not specifically address the issue of updrafts. It is commonly known that tornadoes demonstrate rotational motion and contract to increase velocity due to the conservation of angular momentum. However, this contraction is not specifically referred to as 'vortex breakdown,' and an updraft dominating the center of the vortex is not a characteristic associated with the core dynamics of a tornado, especially during the intense rotation. Therefore, the statement is False.