which numbered layer in this photograph represents the oldest layer? 1 3 4 2

Answer:

1. Option 1

Brief Explanations:

In geology (a sub - field of Natural Science), according to the principle of superposition, the oldest layer is at the bottom. Without seeing the specific order in the image, assuming a typical vertical layering, the bottom - most numbered layer (usually the one with the lowest number if numbered from bottom - up) is the oldest. Here, the lowest number among the options is 1.