Explain how rocks on the seafloor record magnetic reversals over time.

At sites of seafloor spreading along divergent plate boundaries, this crust is separated into parallel bands of rock by successive waves of emergent magma. When Earth's geomagnetic field undergoes a reversal, the change in polarity is recorded in the magma.

Source: https://kids.britannica.com/students/assembly/view/194471

During a process called sea floor spreading the oceanic crust separates and spreads apart along a mid-ocean ridge.

Human embrogeneis(plus i cant see the image)