The correct answer is: [A]: "urea" .
___________________________________________________
Totally normal. I have 2 little brothers about your age and they said the same thing.
Blood is really blue , it turns red when it hits oxygen..
i really don't the other ones...
im sorry but i hope this helps :3
Carbohydrates when broken down become ATP which is the currency for energy in the body, Calories is the ATP that the food could roughly be broken down into in the body,