The mould and cast fossil is Option B.
The carbon film fossil is Option C.
The Amber fossil is Option A.
The ice fossil is Option D.
Step-by-step explanation:
Mould and cast fossils are formed when an organism or any organic object gets buried inside sediment and gets decomposed off, leaving an empty space between the sediments which are occupied by different minerals like carbon, calcium, silica etc. Thus, this mineral takes the shape of that decomposed object and stays for years.
The carbon film fossils are those fossils which take long time to form and are difficult to recover as well. They are formed when some organic substance gets very deep into Earth's surface and gets burned by the interior lava into only a thin layer of carbon.
The amber fossils are very common which are formed when the living organisms get stuck in plant resins and dies, which are enclosed into the plant's resin and are recovered thousands of years after.
The ice fossils aren't actually fossil because in very cold regions, the dead bodies often don't decompose but remain as it is for years. Thus the soft tissues are also recoverable after many years.