Final answer:
Fossil animals evolved from a common ancestor with modern animals.
Step-by-step explanation:
Fossils provide solid evidence that organisms from the past are not the same as those today, and fossils show a progression of evolution.
The fossil record tells the story of the past and shows the evolution of form over millions of years. Fossil animals looking like modern animals with some differences suggests that fossil animals evolved from a common ancestor with modern animals.
Therefore, the correct explanation is option B: Fossil animals evolved from a common ancestor with modern animals.