C.
Hope I helped xx
Note: Think about these issues. One is a disease, one is an addiction, and one is a virus. C is a virus because it can be multiplied and spread.
Answer:
1,000-2000 IU per day
Explanation:
The recommended value by health professionals is a lot higher because this value is used for a healthy lifestyle. The Dietary Reference Intake for Vitamin D (600 UI) is the minimum required for men and women. Many people need almost double that amount to keep up with their lifestyles.
Vitamin D is a vitamin that is made by the body when exposed to sunlight. In areas that do not get much sunlight hours, it is recommended to take supplements.
Cancer would definitely need to be focussed on, air pollution is a known cause of cancer
Answer:
The answer is A, an object must reflect light.
Explanation:
You can't see anything if there isn't any light to see. Therefore something would have to reflect light in order for us to see it. Hope this helps!