Which elements are found in all living things?

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

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?

Long term exposure to waves can cause sunburns and skin cancer.