Answer

A rock is a naturally formed mass of mineral matter, majorly consisting of parts of the Earth's crust and mantle.



Rocks are NOT living creatures themselves, although many organisms that live in, on or around rocks may make it appear as though the rock itself is alive , and has the ability to eat.





Examples of what rocks appear to 'Eat':





Ants and worms. Want proof? Turn over just about any rock and you will find all their victims trapped underneath. They are always grateful when you release them. Rocks are so cruel. In fact, the bigger the rock, the bigger the prey. Rocks will eat just about anything significantly smaller than themselves, including humans (see related link below).

It is obvious that rock eating habits are responsible for the extinctions of various plants and animal species. Just look at the bones of dinosaurs that have been found inside of rock. The eating habits of the rock coal were obviously responsible for the extinction of the Carboniferous Period forests. And limestone must have had a voracious appetite for sea creatures and shark teeth.

It is important to distinguish between land rocks and sea rocks, however. If you turn over a rock on the beach, you will find crabs and snails.

It is also known that rocks eat your brains; as in "You have rocks in your head"!

After digesting a kill, rocks excrete their waste through tiny pores on their bodies. This green waste, called "lichen", is a prized delicacy and is the basis of the French cheese "Roquefort" (literally, "Rock Fart").

One of the most amazing species of rock, the Death Valley sailing stones, actually can take advantage of wind current to pursue their prey. Sailing Rocks are a huge mystery to scientists because the rocks move in long tracks along a valley floor without human or animal intervention. They have been recorded and studied by researchers but the force behind their movement is still not understood.