Final answer:
An 'assorted' pack provides a variety of options and is common for items like Crayolas and Band-Aids. Grouping items is practical for small or numerous objects, such as when selling them by the dozen or gross.
Step-by-step explanation:
The type of pack that offers lots of choice, as seen with Crayolas and Band-Aids, is known as an assorted pack.
This kind of pack provides a variety of options, which can be advantageous when the selection is desired over having multiples of the same item.
Using units of a specific number of items is common in various aspects of our daily purchasing habits.
For instance, eggs come by the dozen, while more minute items, like straight pins or staples, are often sold in a group of 144, known as a gross.
When handling very small objects, grouping is efficient and sometimes necessary due to their size and quantity.