Which option gives the correct cause-and-effect relationship for Variation and evolution, Variation: students must explain that variation may be caused by inherited genes.

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 explain that variation may be caused by inherited genes.. 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 explain that variation may be caused by inherited genes.. Correct cause and effect: DNA is the molecule; a gene is a functional section of that molecule. This matches Variation because students must explain that variation may be caused by inherited genes. is correct because DNA is the molecule; a gene is a functional section of that molecule. The learning objective says students must explain that variation may be caused by inherited genes, 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..