Final answer:
The run chart is the tool used to find changes in data points over time. It is a line graph that indicates how data changes and can illustrate trends, allowing for a clear visualization of temporal data fluctuations.
Step-by-step explanation:
The basic tool that seeks to find changes in data points over time is the run chart (d). A run chart is a line graph that displays data points in a time sequence. It is particularly used to spot trends, shifts, or patterns that may occur over a certain period, thereby providing a visual representation of changes that may not be easily evident by just looking at raw data.
Other tools mentioned, such as a Fishbone diagram and Histogram, also deal with data but in different ways. A Fishbone diagram is primarily used to identify the various potential causes of a problem, while a Histogram is used to represent the frequency distribution of a set of continuous or discrete data.