Explanation:

- Work is defined as the dot product of force and displacement vectors. It depends on the angle between them.

- The formula is: Work = Force × Displacement × cos(?).

- Option 1: 0°

- Occurs when force and displacement are in the same direction.

- Cos(0°) = 1, hence maximum positive work.

- Option 2: 45°

- Force and displacement are partly aligned.

- Results in positive work but not maximum.

- Option 3: 90°

- Force and displacement are perpendicular.

- Cos(90°) = 0, hence no work is done.

- Option 4: 180°

- Force and displacement are in opposite directions.

- Cos(180°) = -1, hence negative work.

- Option 4 is correct: Force is directly opposite to displacement, causing negative work.

.