"the composition of magma will when it erupts and turns into lava."

ANSWER:

The composition of magma will remain the same when it 'erupts and turns into lava'.

EXPLANATION:

As we understand magma is the name for the molten rocks which are present and found in the crust of the earth. Now, the process goes as magma goes towards the 'surface of the earth' and that state will be called lava. The reaching of magma to lava is happened through vent or a hole of a mountain causing eruption.

Sequoia national park  /  inyo national forest, california, u.s. mount whitney is the tallest mountain in california, as well as the highest summit in the contiguous united states and thesierra nevada—with an elevation of 14,505 feet (4,421 m).

Answer b is the answet