Is there solid rock underneath the surface of earth

Only under 1, because Earth's outer layer is made of hard, solid rock under continents but not under the ocean.

not too sure maybe olecranon process

what have scientists found to be the most efficient and effective way to insert new sequences into an individual? a-scientists have created genetically altered foods that release dna during digestion. b-scientists use viruses to insert specific gene sequences. c-scientists irradiate genes so that they can be absorbed through the skin.