Which statement accurately describes mass-energy equivalence?
it includes the idea that mass is a measure of the energy within an object.
it states that mass-energy can be created or destroyed.
it can be represented using the formula e = m_c.
it states that all energy in the universe will be converted to mass.

answer:

ich statement accurately describes mass-energy equivalence?

it includes the idea that mass is a measure of the energy within an object.

it states that mass-energy can

explanation:

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.