Mr. Nair shines his torchlight at a stone, as shown in the diagram.
What can he do to get a bigger shadow on the screen?
(1) Move the stone nearer to the torchlight.
(2) Move the torchlight further away from the stone.
(3) Move the screen away from the stone.
(a) 1 only
(b) 1 and 2
(c) 2 and 3
(d) 1 and 3