Which styles of music was bob dylan known for first combining?
folk music and rock music
rock music and blues music
country music and bluegrass music
folk music and country music

The first option folk music and rock music

Explanation:

Bob Dylan's combination of his old and new style resulted in the new style of music, Folk Rock. Folk music traditionally takes liberal political positions against racism and war.

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).