Which word indicates a lack of harm or risk?

The word "innocuous" is the best choice because it specifically refers to something that is not harmful or offensive. It conveys the idea of being safe or harmless, often implying that an action, remark, or substance does not pose any threat or danger. In various contexts, it can describe statements, behaviors, or products that are benign and unlikely to cause any adverse effects.

The other options present different meanings that do not align with the concept of lacking harm or risk. "Marred" refers to something that has been damaged or spoiled, which directly contrasts the idea of being harmless. "Integrity" pertains to the quality of being whole or undivided, and often relates to moral principles, making it irrelevant to the idea of harm or safety. Lastly, "methodical" describes a systematic approach or orderly procedure and does not convey any direct reference to the presence or absence of risk. Thus, "innocuous" clearly stands out as the word that indicates a lack of harm or risk.