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.
there is several ways that waves can move. waves can move by wind. the energy passes to the water causing waves. The better answer. Waves move because they are a movement o â¦ f energy through a medium. The wave entails two parts, which are the crest and trough. The wavelength is the distance between two crest.