The la brea tar pits are an example of a fossil fuel that
is a quickly renewable resource.
takes centuries to create.
is made of decomposed human bones.
will never become scarce

I think the correct answer would be the second option. The La Brea Tar Pits are an example of a fossil fuel that takes centuries to create. It is a group of tar pits which is located in Los Angeles. This formed as the result of seepage of natural asphalt up the ground for about 10000 years. Along with this process, the are bones of animals that were trapped in the tar pits. These bones were formed to fossil fuels. In these pits, a number of bones of animals where found and their ages were found to be thousand of years old. Fossil fuels are formed from extreme temperature and pressure underneath the ground. This process takes a very long time.