Final answer:
Fossils found in deeper layers are older and have more complexity than the fossils found in shallow layers.
Step-by-step explanation:
Fossils found in deeper layers are older and have more complexity than the fossils found in shallow layers.
This is because the deeper layers were formed earlier and contain older fossils, while the shallow layers were formed more recently and contain younger fossils.
For example, let's say we have a rock formation with three layers: A, B, and C.
Layer A is the deepest and contains the oldest fossils, layer B is in the middle and contains intermediate-aged fossils, and layer C is the shallowest and contains the youngest fossils. The fossils found in layer A would be older and more complex compared to the fossils found in layer C.