Which explains the sequence of energy transformations during photosynthesis? chemical energy is transformed into light energy. chemical energy is transformed into heat energy. light energy is transformed into chemical energy. heat energy is transformed into light energy.

Light energy is transformed into chemical energy.

During the process of photosynthesis light energy from sunlight is trapped by chlorophyll pigment present in chloroplast. This trapped light energy along with water and carbon dioxide produces carbohydrates as source of food. These carbohydrates are converted into ATP molecules, which are stored in the form of chemical energy.  

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).