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Answer:
Wind can change landforms by weathering, erosion and deposition. Fast water, with a lot of energy, can erode a lot of sediment.
You could be depressed from a lot of different things, from losing your job to someone passing away
The advertisers treat teenagers as separate target audiences by having to advertise products that would attract the teenagers alone as the teenagers are not particularly attracted to things that they may target the adult audiences, that is why, they laid out products that would target the teenagers in means of separating the target audiences.