Answer:
mutualistic
Explanation:
both organisms get something out of it
Erosion and collisions
such as mountain ranges and conyons
This type of fossil is called a mold. A cast fossil forms when a mold
fossil is filled with some form of mineral, usually through the seepage
of water depositing the minerals within the mold. In time, the mold is
filled and the materials deposited harden, creating a replica of the
original fossil.
Hope this helps you :p
