Molds, casts, and petrified wood are fossils that often lack any of the tissue of the original organism. Explain why molds, casts, and petrified wood are still considered evidence of life. Please help i really need help

rocks and weathering-matching

the wires in the toaster turning red and the toast crisping and turning brown

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.