which fossils are formed by sediments and found in sedimentary rock?\n- a skull of a fish skeleton and a…

which fossils are formed by sediments and found in sedimentary rock?\n- a skull of a fish skeleton and a cast of a clamshell\n- a cast of a clamshell and a frozen animal\n- a frozen animal and a piece of petrified wood\n- a piece of petrified wood and a preserved insect
Answer
Brief Explanations:
Fossils in sedimentary rocks are often formed from the remains of organisms that get buried in sediments. A fish skeleton and a clam - shell are remains of organisms that can be buried in sediments over time and form fossils in sedimentary rocks. A frozen animal is not a fossil formed by sediments as it is preserved in ice, petrified wood is formed through a different process of mineral - replacement usually in other rock - forming processes, and a preserved insect is often in amber (not formed by sedimentary processes in the traditional fossil - in - sedimentary - rock sense).
Answer:
A. a fossil of a fish skeleton and a cast of a clamshell