Answer
a) Curved
b) Straight
c) Circular
d) Scattered
Work Step by Step
a) A roller costar moves in multiple different directions in a continuous path, so it is a curved path.
b) A pencil is a straight line, so it is a straight path.
c) A carousel moves around in a circular path.
d) Darts on a dart board are a bunch of random points which are not connected, so they are scattered.