Kriya observed the shadow of a tree at 8.00am, 12.00 noon and 3.00pm. Which of the statements is closest to her observation?

Question

$\begin{array}{1 1} \text{a. The shadow of the tree changes but the size remains the same.} \\ \text{ b. The size of the shadow of the tree changes but shape remains the same.} \\ \text{ c. Both size and shape of the shadow of the tree change} \\ \text{ d. Neither the shape nor the size of the shadow changes.} \end{array}$