A shell is considered as biotic (living) because it is a hard, rigid covering of many animals such as snail, sepia, pila, turtles, sea urchins. A shell is protective outer layer of these soft bodied animals.
The answer is.d. stromatolites hope it help
Transpiration<span> is the process which moisture is carried through plants from roots to small pores on the under part of leaves, where it changes to water vapor and is released to the earth. </span>Transpiration<span> is essentially evaporation of </span>water<span> from plant leaves.</span>
