Answer:
Options (1), (2), (3) and (4)
Explanation:
Mid oceanic ridge is the region along the spreading of the sea floor occurs. Along this ridge, the magma come out to the surface, and lava forms pillow shaped rocks such as pillow basalt. Basalt is the dominant rock type in the oceanic crust.
There occurs striped patterns that are oriented parallel mid oceanic ridge, and this strips depicts the magnetic field of the earth, and it keeps on changing on each eruption of this magma beneath the ocean long this ridge.
The mid oceanic ridge suggests the spreading of the sea floor and the rocks present at this ridge are younger than the rocks that are away from the ridge.
This rocks are comprised of the molten iron material that are present in the mantle and suggest the magnetic field of the earth during the time of eruptions.
Hence, the correct answers are options (1), (2), (3) and (4).
