The locus of a toy bird fixed at the tip of one of the blades of a rotating ceiling fan is a:

1. straight line

2. circle

3. semi-circular arc

4. diameter of the circle so formed

Given,

The toy bird, fixed at the tip of the blade, is at a constant distance from this central point.

The locus of a point equidistant from a fixed point is a circle with fixed point as centre.

Thus, the locus of toy bird will be a circle.

Hence, option 2 is the correct option.