What generally happens when additional scale levels are included in a map package?

Including additional scale levels in a map package typically increases the number of necessary datasets. When you add more scale levels, each level usually requires its own set of data that is appropriate for that particular scale. For example, higher scale levels (more zoomed-in) might need more detailed datasets that provide information at a finer granularity, while lower scale levels (more zoomed-out) may rely on more generalized datasets. This varying level of detail ensures that the map maintains clarity and usefulness at different scales, leading to an increase in the volume of data required to support the map effectively.

In contrast to the other options, including more scale levels does not inherently improve performance or decrease file size; in fact, it tends to have the opposite effect, as each additional scale adds more data to be processed. The level of detail also changes according to the scale; lower scales will show less detail while higher scales will show more, highlighting that the overall detail is not unchanged. Therefore, the correct response reflects the reality of managing datasets in relation to scale levels accurately.