Looks at the piece above. what type of medium was used to create this piece how were the different values achieved? what makes this medium challenging?

This piece is an example of silverpoint. The values in a silverpoint work are created by using a thin wire that is held by a cylinder-shaped holder. The artist must slowly build up scratches overtime, in order to created darker values. The greater the etching or scratching, the darker the value. This medium is challenging because it cannot be erased and it takes a long time.

If this is the picture of the bird with the columns on the sides of the picture, then that is the answer.

This piece is an example of silverpoint. The values in a silverpoint work are created by using a thin wire that is held by a cylinder-shaped holder. The artist must slowly build up scratches overtime, in order to created darker values. The greater the etching or scratching, the darker the value. This medium is challenging because it cannot be erased and it takes a long time.

If this is the picture of the bird with the columns on the sides of the picture, then that is the answer.

option c (nickel) is not found in earth's crust. the earth's crust basically contains eight (8) elements namely: oxygen, silicon, aluminum, iron, calcium, sodium, potassium and magnesium (listed in order of abundance).

this is a experment where you actully have to do the work like go take some photos in something your interstid in