Final answer:
Graphite is malleable, conducts electricity, has a high melting point, and a simple structure. It is used as a lubricant due to its ability to slide easily.
Step-by-step explanation:
Graphite, a form of carbon, is correctly described as malleable, conducts electricity, and has a high melting point. It is also characterized by a simple structure. In graphite, carbon atoms are arranged in layers and held together by weak interlayer interactions. Due to its structure, graphite can easily slide past one another, making it a good lubricant.