What is the variety of all living things within an area?

Well lack of competition LEDS TO> lots of variation which LEDS TOO> speciation

I hope that helps

The answer is a if u read the definition it makes sense

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.