Wholesalers are traditional "Middle Men" they buy large bulk from manufactures, most of the time with their own transportation (Their Niche) and they sell and deliver in smaller quantities to "Retailers" and charge more per unit.
Can we get a picture? or graph?
Answer:
There are three main types of rocks: sedimentary, igneous, and metamorphic. Each of these rocks are formed by physical changes—such as melting, cooling, eroding, compacting, or deforming—that are part of the rock cycle. Sedimentary rocks are formed from pieces of other existing rock or organic material.
source:
https://nationalgeographic.com
Explanation:
What is time dilation?
Answer: Time dilation is the difference of time between two events. This events are measured by two different observers that are moving relatively to each other or that are present two different places.
I hope it helps, Regards.