During detachment,

a : rock particles are transported to another location
b : rock fragments are picked up by wind, water, or ice
c : sediment is dropped off at a new location
d : landforms, like beaches and sand dunes, are formed

Ithink it with medical history because people can see thing that they would not would be able to in real life.

Social networking sites d. online forumsthe first recognizable social media site,  six  degrees, was created in 1997. it enabled users to upload a profile and make friends with other users. in 1999, the first blogging sites became popular, creating a social media sensation that's still popular today.