What do you mean by Secondary colours?

Consider two metallic rods mounted on insulated supports. one is neutral, the other positively charged. you bring the two rods close to each, but without contact, and briefly ground the the neutral rod by touching it with your hand. show answer correct answer what would be resulting charge (if any) on the initially neutral rod

You can melt ice by applying pressure because the solid/liquid line has a slope.

Which change would make the diagram correct?