Answer:
Annotation symbol.
Step-by-step explanation:
A flowchart can be defined as a graphical representation of an algorithm for a process or workflow.
Basically, a flowchart make use of standard symbols such as arrows, rectangle, diamond and an oval to graphically represent the steps associated with a system, process or workflow sequentially i.e from the beginning (start) to the end (finish).
A symbol shown as a three-sided box in a flowchart, that is connected to the step it references by a dashed line is known as an annotation symbol.
This ultimately implies that, it provides additional information in the form of remarks or comments with respect to the steps in a flowchart.