The move from town A to town D through multiple stops is an example of what type of migration?

Step migration refers to a process in which individuals or groups move from one place to another in a series of stages or steps, rather than making a large move all at once. In the scenario described, moving from town A to town D through multiple stops indicates an incremental approach to migration, where each stop represents a step towards the final destination. This method can occur as individuals or families gradually adjust to increasingly urbanized areas or seek better opportunities in a methodical manner.

In contrast, chain migration involves a process where people migrate to a new area because relatives or members of the same nationality have already settled there, which does not apply in this case since the focus is on the stops made. Seasonal migration refers to the regular movement of people based on changes in seasons or climates, and voluntary migration covers movements made by choice, influenced by particular factors but does not specifically address the stepwise nature of the journey. Thus, the correct identification of step migration highlights the multi-stage aspect of the movement described in the question.