What was vellum originally made from? a. horse skin b. sheep skin c. treated parchment paper d. none of the above Please select the best answer from the choices provided A B C D

The correct answer is d. none of the above

Explanation:

Vellum was originally made from calfskin. They are typically used as a surface for writing. Vellum was prepared for many purposes like writing, produce single pages, or for printing, etc. They have great variation which is dependent on skin quality and preparation method but they are generally smooth and durable.

Now the paper vellum is synthetically made from cellulose fiber which is obtained from plants because preparation of vellum from animals' skin is time-consuming and expensive. Therefore the correct answer is d.

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave