Why is it important to bond or ground when working around flammable vapors?

Bonding and grounding in environments where flammable vapors are present is crucial for safety. The primary reason for this is to prevent serious accidents, such as explosions or fires. Flammable vapors can easily ignite if there is a source of electrical energy or static electricity. Proper bonding and grounding ensure that any stray electrical current or buildup of static charges is safely directed to the ground, thus reducing the risk of ignition.

This practice protects workers and the facility by creating a controlled environment that minimizes the chance of electrical sparks igniting flammable substances. The other options, while relevant in different contexts, do not address the immediate hazards posed by flammable vapors. Enhancing electrical efficiency, facilitating maintenance, or reducing noise interference do not contribute to ensuring safety in potentially explosive atmospheres.