What is the main advantage of the WebM video file format? A. WebM files are smaller and download faster than other video file formats, but do not sound as good.

B. WebM files are smaller than and effectively compete with other video file formats, but are not open-source.

C. WebM files are larger, download faster, and look as good as other audio file formats.

D. The WebM file format is open-source and effectively competes with proprietary file types.

Through the process of sedimentation,sediment is turned back to rock to form sedimentation.the process of sedimentation is: > deposition-where fragments were deposited into the river or sea under gravity or travelling agent such as wind or water. > sedimentation-the fragments deposited in the river sedimented and accumulate> compaction-the layers of fragments deposited undergoes compaction due to the weight if the upper layers> cementation-chemical substance of the fragments such as cement dissolved into the water and cement the other fragments together to form sedimentary rock.thus,cementation and compaction are the process.on the other hand, transformation only occur when a rock under goes metamorphism(compaction or extreme heat).while recrystillization occurs when a rock is melted and cooled down,which also requires metamorphism to take place.hope it !