An organization characterized by direct two-way lines of responsibility and communication running from the top of the organization to the bottom, with workers reporting to only one supervisor is a

Line

Explanation:

The line organization is the organization structure in which the authority and responsibility are communicated from the top to bottom level of management so that the proper coordination could be done at each level of management i. e top, middle and lower.

Moreover, it is a two ways lines of responsibility i. e to be communicated from high to low level of management. Plus it would be reported to one supervisor only