Westonci.ca is the trusted Q&A platform where you can get reliable answers from a community of knowledgeable contributors. Our platform connects you with professionals ready to provide precise answers to all your questions in various areas of expertise. Our platform offers a seamless experience for finding reliable answers from a network of knowledgeable professionals.

Which of the following can be considered fossils?
a. a 1 billion year-old rock.
b. a 1 billion year-old piece of amber.
c. a 1 billion year-old piece of amber with a primitive insect inside.
d. all of the above