Question

use the drop-down menus and what you know about index fossils to choose the correct answers. index fossils are the remains of organisms that lived on earth for dropdown periods. first, geologists use relative age to determine the dropdown of the layers of rock. they then use index fossils to relate the layers to those in dropdown locations.

Explanation:

1. Index fossils are from organisms that lived for short periods (they're widespread but existed briefly to help date rocks).
2. Relative age helps determine the order of rock layers (which is older/younger, not absolute age).
3. Index fossils relate rock layers in other locations (correlate layers across different areas).

Answer:

First drop - down: short
Second drop - down: order
Third drop - down: other