I think it is 3 i'm not sure but i'm about 70% sure
D. fingernails
Skin, hair, and vertebrae are all the outer layer of the body and protect the body. The fingernails aren't part of that.
Answer:
NO
Explanation:
Sunlight is an electro-magnetic wave not a substance therefore it does not have a chemical compound
Answer:
Heart disease is prevalent in the United States because... well, we consume a lot of sodium and fat. If you look at the stats, we are the third country with the most obese residents, with a whopping percentage of 36.20% people in the US tipping the scales. Also, people smoke a lot. Not just adults, but teenagers. Because of this, youngsters tend to also get heart disease too, despite the small age. According to cdc.gov, a family history of heart disease increases the rates, especially if one of your relatives got it under the age of 50. Due to the smoking rates at a young age, those diseases tend to transfer and increase the rates of the future US citizens.
Heart disease can affect a lot of organs, but listing them would be a pain. Here are the highlights: The heart and the lungs are intimately connected. This means that having heart disease may lead to having trouble breathing. You may have chest pains, and particularly in woman, it may affect the digestive system and cause stomach pain when eating.
You WILL lose thermal energy cuz heat will always flow from warmer to cooler.
Hope it helps!
