01 What kind of value transition does a soft edge show?
Answer and explanation
Correct answer: A. A gradually changing value
Explanation: The governing concept is edge softness as a rate of tonal change. At a soft edge, the value moves gradually from light to dark, so the boundary looks blended rather than sharply drawn. This is common on rounded forms where illumination changes progressively. An abrupt transition indicates a hard edge, while complete blackness or absence of shadow describes a value condition, not edge quality. Therefore, option A is correct.