Question

which of these is most likely to become a carbon film?
a dinosaur leg bone
a sea creatures shell
a flowering plant
a tree trunk

Explanation:

Carbon films form when thin, flat organic materials are compressed over time, leaving a carbon residue. Flowering plants are thin and have less dense, more compressible tissue compared to the other options (bone, shell, thick trunk) which are hard or bulky and more likely to form other fossil types like permineralized fossils.

Answer:

a flowering plant