Final answer:
The sentence refers to a dashboard with user-friendly icons that track developmental milestones. Dashboards often provide a visual overview of various aspects of the developmental cycle and are particularly helpful in monitoring progress and identifying if any stage gets halted.
Step-by-step explanation:
The sentence you are trying to complete is describing a tool or resource that helps users monitor the progress of a development cycle. The best fit among the provided options is dashboard, which includes user-friendly icons that allow you to follow the milestones if your development cycle halts.
A dashboard is typically a visual representation of key performance indicators and metrics, which are often symbolized by icons. For example, in the context of product development, a dashboard might illustrate different stages like the budget for product development, the designs used to conceptualize a product, the engineering design process, or even measures like the rate of water flow through a hose in a physical product test scenario. The arrows in the images provided in the reference material represent a process flow from one phase to another, leading up to the completion of an overall goal.