Which option gives the correct cause-and-effect relationship for Variation and evolution, Variation: students must define variation as differences in characteristics between individuals in a population.

The correct option is Correct cause and effect: DNA is the molecule; a gene is a functional section of that molecule. This matches Variation because students must define variation as differences in characteristics between individuals in a population.. It is the only option that keeps DNA vs genes separate and answers the approved learning objective in Variation.

The correct option is Correct cause and effect: DNA is the molecule; a gene is a functional section of that molecule. This matches Variation because students must define variation as differences in characteristics between individuals in a population.. Correct cause and effect: DNA is the molecule; a gene is a functional section of that molecule. This matches Variation because students must define variation as differences in characteristics between individuals in a population. is correct because DNA is the molecule; a gene is a functional section of that molecule. The learning objective says students must define variation as differences in characteristics between individuals in a population, so the answer must stay inside Variation. The alternative options are wrong because they either treating dna as if it always means one gene., calling a gene a whole chromosome., or drift away from when asking about dna, test molecular structure, base sequence, nucleotides, or genetic information storage..