Assertion (A): Robots use actuators for movement.

Reason (R): Actuators sense the environment and convert it to electrical signals.

1. (A) is true but (R) is false.
2. (A) is false but (R) is true.
3. Both (A) and (R) are true and (R) is the correct explanation for (A).
4. Both (A) and (R) are true but (R) is not the correct explanation for (A).

(A) is true but (R) is false.

Reason — Robots use actuators to produce movement by converting energy into mechanical action, so the Assertion is true. However, sensing the environment and converting it into electrical signals is the function of sensors, not actuators. Therefore, the Reason is false.