deep within earths mantle, some materials sink toward the planets center, while others rise toward the…

deep within earths mantle, some materials sink toward the planets center, while others rise toward the surface. which property of a material is directly related to whether it will rise or sink? a acidity b conductivity c density d hardness
Answer
Brief Explanations:
Density determines buoyancy. Materials with higher density than the surrounding medium sink, while those with lower density rise. Acidity, conductivity, and hardness are not directly related to rising or sinking in Earth's mantle.
Answer:
C. density