Many years ago, tree-climbing, leaf-eating iguanas migrated from the mainland of South America to the Galapagos Islands. The only food available was algae that
grew on the rocks in the water near shore. Scientists believe that the iguanas that
survived were those that could swim well, cling to slippery rocks with large claws,
and eat a new diet. What type of adaptation is this?

the earth is thought to have been formed about 4.6 billion years ago by collisions from a cloud of hydrogen, helium, rock, ice and other materials. these were pulled together by gravity to form objects in and around earth like- asteroids and small early planets called planetesimals.

so, the best possible answer to this question will be option d- to harden materials to form different parts of earth’s layers

density and pressure

what questions are you talking about ?