Icome from a mine and get surrounded by wood always. everyone uses me. what am i?

Brainliest what are fingernails made of?

Brian said that when you get your body broken such as a arm or leg. it means your bones break to pieces and must do surgery or get a cast to fix it.is it true or false?

When calculating the daily protein needs for marathon runners or competitive weightlifting, you should allow for approximately grams of protein per kilogram of body weight