Carbohydrates are a source of energy. When broken down, the body uses them to power all its functions.
Answer:
a nonpolar
Explanation:
not sure, 'cause English isn't my first language
The mass of a star can be determined by studying D) binary star systems.
Although there may be other ways to determine the mass of a star, this is the most common one which is widely used all over the world when it comes to measuring objects in the universe.
