Answer: A. combustion
Explanation: During complete combustion, carbon and hydrogen react with oxygen (O2) to produce carbon-dioxide (CO2) and water (H2O). The carbon-dioxide produced is released into atmosphere and is utilized for carbon fixation and recycling.
Genes are the biochemical units making up chromosomes. The human traits are being influence by genes acting together. Inherited genes do contribute to individual differences in temperament which is the answer. It refers to the individual differences in behavior biologically yet independent in regard to learning, attitude and values.
