(2) these free radicals are produced naturally, certain foods can increase their

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 1 to 5.

YOU ARE WHAT YOU EAT

Would you imagine that what you eat could affect how youthful you look? According to one scientific theory, our bodies start aging due to oxidation (1)______ is caused by certain oxygen-containing molecules called free radicals. They damage cells, and as we get older, our repair mechanisms become weaken, resulting in signs of aging, such as wrinkles. (2)______ these free radicals are produced naturally, certain foods can increase their levels.
To maintain youthfulness, not only should we avoid foods that could increase free radicals, but we should also (3)______ foods rich in vitamins and micronutrients. For example, vitamins like A and E, found in (4)______ dark-coloured vegetables such as carrots, seaweed, spinach, and squash, are especially good for fighting off the harmful effects of free radical production. Green tea, recently, is well known for its youth promoting (5)______ properties, and we know more now about the beneficial properties of foods such as olive oil and sesame oil. Youwill look more vibrant and feel better when applied directly to the skin as well as when they are included in thediet. This will help you stay young and healthy from the inside out.