How do organisms form carbon films? Organisms turn into rock.
O Residue is left on rocks when organisms decay.
Hollow forms are left in sediment by decaying organisms.
O Organisms leave evidence of their activities, such as footprints.

When an organism is covered by sediment, it begins to decay. When decaying, the organisms release a gas. This process in turns leaves a thin film of carbon that preserves parts of the organisms.

Explanation:

i’m   sure probably just geuss and see which one you can get right, i’m pretty sure it is the combination of goods and services