Earth’s inner core is solid because of
a. the composition of its rock.
b. its great diameter.
c. extreme cold.
d. immense pressure

The earths core isn't solid. its lava that's slowly cooling. The mantel which surrounds the core us made of rock so the most probable answer to this inaccurate quetion is most likely A

The main role of dna in the  cell is the long-term storage of information. it is often compared to a blueprint, since it contains the instructions to construct other components of the  cell, such as  proteins  and rna molecules.the main function of rna is to carry information of amino acid sequence from the genes to where  proteins  are assembled on  ribosomes  in the  cytoplasm. mark brainliest, my work is good.