Answer:
C. Saturn
Step-by-step explanation:
The planet with a density of 0.69gcm⁻³ is Saturn.
Saturn is a Jovian planet located beyond the inner planets. Saturn as an outer planet is made up gases most especially helium and hydrogen. Since it has a density less than water, almost all the matter here are in the gaseous phase.
The planet is the second largest in the solar system famed for its unique rings circles it.