Arrange these steps in the nitrogen cycle in the correct order to explain how nitrogen from the atmosphere cycles through the other spheres

In what layer of the sun is energy transfers between atoms

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?