Which of the following is part of pre-start checks for a chainsaw?

Part of the pre-start checks for a chainsaw involves ensuring that there is sufficient fuel and chain oil. This is crucial for the safe and effective operation of the chainsaw. Adequate fuel ensures that the engine can run properly without stalling, while sufficient chain oil is necessary to lubricate the chain during operation, reducing friction and helping to prevent overheating and wear. By checking these crucial elements, an operator can help ensure the chainsaw operates efficiently and safely, which contributes to better performance and longevity of the tool.

Other options do not promote proper chainsaw maintenance and safety. Rust on a chainsaw indicates neglect and could compromise its integrity and performance. Ignoring safety features could lead to injuries, and merely checking the design does not address the operational readiness of the equipment. Hence, focusing on fuel and chain oil checks is integral to responsible chainsaw maintenance.