Which relationship becomes weak if a fruit rests on a book but has no contact shadow?

Correct answer: The fruit resting on the book

The governing concept is contact shadow in observational drawing. A small, dark value directly beneath the fruit shows where it touches the book and visually anchors its weight. Without that shadow, the gap appears open and the fruit seems to float. Colour, book texture, and light-source height may affect appearance, but none proves physical contact as directly as the contact shadow.