Answer: Dr. Colbert has suggested to Mariam that she consider increasing her daily intake of foods containing antioxidant vitamins to lower her risk of developing certain age-related diseases. Dr. Colbert's recommendation suggests that she believes aging is due to damage from free radicals.
Step-by-step explanation:
Free radicals can cause damage to parts of cells such as proteins, DNA, and cell membranes by stealing their electrons through a process called oxidation. (This is why free radical damage is also called “oxidative damage.”).