Answer:
Option D
Fish
Explanation:
The characteristics of index fossil is distinctive, widespread, abundant, and limited in geologic time. Ammonites fit these demands well and are the best-known fossils that have been widely used for this.
Thus, The answer is Fish
Answer: beetle
can you be more detailed...?
D) Migration Rate
I hope this helps :)
a) are the sources of long-period comets.
