In robotics and artificial intelligence, an “intelligent robot” is characterized by the capability to make decisions (e.g., selecting actions based on sensor data and goals), beyond simply executing fixed motion sequences.

Introduction / Context:
“Intelligence” in robotics refers to more than mechanical capability. It implies perception, reasoning, and action selection under uncertainty. An intelligent robot interprets inputs, weighs alternatives, and chooses actions aligned with goals, constraints, and learned experience. This differentiates it from purely repetitive automation that follows rigid scripts without adaptation.

Given Data / Assumptions:

• Sensors (vision, force, lidar) provide data about the environment.
• Control software must select actions rather than merely replay trajectories.
• Intelligence is independent of payload, gait type, or speech ability.

Concept / Approach:
Decision-making involves mapping perception to action. Approaches include rule-based logic, optimization, planning, and learning algorithms. The essence is autonomy in choosing among alternatives to achieve objectives, such as avoiding obstacles, adjusting grasp strategies, or rescheduling tasks after a failure.

Step-by-Step Solution:
Identify the capability that implies autonomy: decision-making.Distinguish this from optional modalities like speech or locomotion form.Conclude that the defining property is the ability to make decisions.

Verification / Alternative check:
A stationary manipulator that selects grasp points based on camera input is intelligent, even if it neither walks nor speaks. Conversely, a walking robot that follows a fixed script without adapting is not necessarily intelligent.

Why Other Options Are Wrong:
Handle only small payloads: payload capacity is mechanical, not intelligence.Walk: locomotion type does not guarantee intelligence.Speak: speech is an interface feature, not a proxy for decision-making.None of the above: incorrect because “Make decisions” is correct.

Common Pitfalls:
Equating flashy features (speech, bipedal walking) with intelligence; overlooking that robust decision-making is the critical attribute in real-world tasks.

Final Answer:
Make decisions