Why do you thing the implementation of economic policies to combat pollution is so complicated

Which of the following is an oxidation-reduction reaction? (pictured below)

Write a paragraph at least 5 sentences “why all vaccinations should be mandatory”

1. watermelon, papaya, oranges, bananas, and lemons are included in this food group. vitamin c 2. you need 6 or more servings of this food group each day vitamins d and a 3. found in fruit and keeps blood vessels healthy calcium 4. vitamins found in milk bread and grain 5. a mineral that strengthens bones fruit