use the image below. Which fossil is a good example of an index fossil? (1 point)

Question

Trilobite because it only appears in one layer (limited time) and in one column (single area).
Gastropod because it appears in multiple layers (long period of time) and in 3 columns (multiple areas) Gastropod because it appears in multiple layers (long period of time) and in 3 columns (multiple areas)
Ammonite because it appears in only 1 layer (limited time) but in 3 columns (multiple areas)

Answer 1

Trilobite because it only appears in one layer (limited time) and in one column (single area).