When a star explodes as supernova, the elements heavier than hydrogen spread throughout the universe.
<u>Explanation:
</u>
The elements that are heavier than hydrogen spread in the universe that is mainly caused, when a star breaks as a supernova. Iron, lead, mercury, copper, gold, and iodine are the heavy elements which are formed and these often exist in a human life.
When these heavy elements cause a star to be overweight, it turns into a supernova and it may blast off, resulting in the release of the heavier elements. Some heavy atoms are created by nuclear fusions that occurs during supernova explosion.
Sedimentary rocks have layers, according to the law of superposition, the rock on the bottom is the oldest.
Hope this helps!
The correct answer is c (sorry if I’m wrong)