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Maintaining higher humidity levels is an effective method to mitigate static electricity ignition because moisture in the air helps reduce the accumulation of static charges. When humidity levels are increased, the water molecules in the air can provide a conductive pathway for static electricity to dissipate, thereby decreasing the likelihood of static discharge that could lead to ignition.

In environments with low humidity, static electricity can build up easily on surfaces and in materials, especially during movement or friction. By raising humidity levels, the air’s conductivity improves, allowing for the safe dissipation of electrical charges, thereby minimizing the risk of ignition from static electricity.

Other options might seem plausible but do not effectively address the risks of static electricity ignition in the same way. For example, increasing temperature could potentially enhance the combustibility of materials, while multiple grounding points may not sufficiently reduce the overall static accumulated, and introducing more conductive materials could alter the properties of a system but does not necessarily prevent the static buildup itself.