Paheli observed the shadow of a tree at 8:00 a.m., 12:00 noon
and 3:00 p.m. Which of the following statements is closest to
her observation about the shape and size of the shadow?
(a) The shape of the shadow of the tree changes but the size
remains the same.
(b) The size of the shadow of the tree changes but the shape
remains the same.
(c) Both the size and shape of the shadow of the tree change.
(d) Neither the shape nor the size of the shadow changes.