Which statement best describes two equivalent fractions?

They must have the same numerator and denominator.

They represent the same portion of an identical whole.

They must have different denominators but the same numerator.

They represent the same amount, even if the wholes are different sizes.

Leo ran $\frac{1}{2}$ of a 1-mile track. Kim ran $\frac{1}{2}$ of a 2-mile track. Are the distances they ran equivalent?

Yes, because the fraction $\frac{1}{2}$ is the same for both.

No, because the 'wholes' (the total track lengths) are different.

Yes, because they both ran for the same amount of time.

It is impossible to determine from the information given.

No, the areas are not equivalent.