Answer:
Excavate - Paleontologist
Dormancy - incredulous
Explanation:
A Paleontologist is a person who deals in the science of the past geological periods using knowledge from fossils.
To excavate means to dig out or remove.
A Paleontologist would some times, have to excavate fossils for studying.
To be incredulous means to be skeptical or unwilling to accept a supposed truth. To be dormant means to be inactive.
If you are incredulous about a thing, it could bring about dormancy because you want to be careful.
