One of the scientists in the video compared ice cores to rings on a
tree. When you look at a cross section of a tree trunk, you can see
rings in it. These rings indicate the annual growth cycle of the tree.
Counting them reveals how many years the tree was alive. What did
the scientist mean when he said that ice cores are like tree rings?

looks like the answer is     c     to me!

1. law of superposition: when there are horizontal layers of rock. the layers at the top are the youngest.

2. law of uncomformity: where one layer is much younger than the previous one, therefore creating a gap in the time record.

3. inclusion: when there is a solid stone inside of another.

4. intrusion: a feature formed when a stone is filled with magma.

hope i answered your question.