Which best identifies why the rusting of an iron nail in the presence of water and oxygen is an oxidation-reduction reaction?

a. water is a reactant
b. electrons are transferred
c. nonmetals and a metal are involved
d. energy is released

The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.

How have the greenhouse gasses increased from the year 2000 to 2018

What best discribes the relationship between wavelength and frequency in a electromagnetic wave