some of the magnetic moments will align in the opposite direction of the main magnetic field, this is known as: a.

Some of the magnetic moments will align in the opposite direction of the main magnetic field, this is known as:diamagnetic materials.Water, wood, the majority of organic compounds, including petroleum and some polymers, as well as many metals, including copper, particularly the heavy ones with many core electrons, like mercury, gold, and bismuth, are examples of diamagnetic materials. All materials have diamagnetism, which always contributes only weakly to the material's response to a magnetic field. However, because other types of magnetism (such ferromagnetism or paramagnetism) are so powerful, the diamagnetic contribution is typically insignificant when numerous types of magnetism are present in a material.Learn more about diamagnetic materials here: https://brainly.com/question/15462756#SPJ4