<em>Answer is B. The fossils in the lower layers are older than the fossils in the upper layers.</em>
Because their soft tissue and bones decay or get eaten before a fossil can be made.
Equilibrium.
diffusion occurs due to differences in concentration of substances in different regions. then substances will naturally spread out (due to innate Brownian kinetic energy). the spreading I. e. diffusion will stop until equilibrium is achieved.
note: those substance particles are still moving due to the innate Brownian kinetic energies!
Answer:
its tongue and camouflage
Explanation:
