Question

how are volcanoes formed?
a. spin of the earth
b. l - waves traveling through earth
c. shock waves from movements in earths crust
d. magma pushes up through earths crust

Explanation:

Volcanoes form when magma (molten rock from the Earth's mantle) rises through the Earth's crust. The spin of the Earth (A) is related to day - night cycle and seasons, not volcano formation. L - waves (B) are a type of seismic wave and not directly involved in volcano formation. Shock waves from crust movements (C) are more related to earthquakes. Magma pushing up through the crust (D) is the correct mechanism for volcano formation.

Answer:

D. Magma pushes up through Earth's crust