which is the youngest in this diagram?

Brief Explanations:

In geological diagrams, the principle of superposition (younger layers are on top of older ones) and cross - cutting relationships (a feature that cuts through others is younger than what it cuts) is used. Here, E is a fault or a feature that cuts through other layers (A, B, C, D). So E is the youngest as it formed after the layers it cuts.

Answer:

E (the option with 'E')