Randomized Controlled Studies: This is a study in which 1) There are two groups, one treatment group and one control group. The treatment group receives the treatment under investigation, and the control group receives either no treatment (placebo) or standard treatment. 2) Patients are randomly assigned to all groups.
winds that blow in a steady direction can move a dune. such wind will consistently pick up sand from one side and deposit it to a other side. this causes the entire dune to s â¦ lowly move in the direction if the wind.
Waves shape a coast when they deposit sediment, which can form beaches, spits and barrier beaches. Deposition occurs when the waves slow down, causing the water to drop the sediment. This process is similar to the deposition that occurs in a river.