Answer:
b. taphonomy
Step-by-step explanation:
Taphonomy -
It refers to the study that how the organism decay and fossils are generated , is referred to as taphonomy .
The scientist Ivan Efremov studies the remaining parts of the organisms present in the environment .
The studies are bifurcated into the organism in phase between the death and burial known as the biostratinomy .
And ,
After the process of burial known as diagenesis .
Hence , from the given scenario of the question ,
The correct option is b. taphonomy .