When the material collides with the Earth's magnetic field and trapped radiation belts, it can dump particles into our upper atmosphere to cause the Aurora.
When this distorted magnetic field eventually snaps back, it accelerates electrified particles towards the Earth.
This primary core is the nucleus.
Hope this helped!!
~xox Melis
Answer:
O because the model makes the concepts easier to understand
Explanation:
The model would help other people understand his results.
The nucleus is still there.