The three correct methods of relative aging of rocks from your list are:
- Superposition - The principle that in undisturbed sedimentary rock layers, the oldest layers are at the bottom and the youngest layers are at the top.
- Original Horizontality - The principle that layers of sediment are originally deposited horizontally under the action of gravity.
- Cross-Cutting Relationships - The principle that if a geological feature cuts through another, the feature that has been cut is older.
Radiometric dating is a method of absolute dating, not relative dating. The other options, "original angularity" and "angular relationships," do not refer to standard principles of relative dating.
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