Here's why:

* Suspension: A suspension is a heterogeneous mixture where particles of one substance are dispersed throughout another substance but are not dissolved. These particles are typically larger than those found in a solution.

* Creamy or Cloudy: The initial creamy or cloudy appearance is due to the dispersed particles scattering light.

* Settling: Over time, the denser particles in a suspension will settle to the bottom due to gravity, leading to a separation of the mixture.

Therefore, the process of the suspension mixture looking creamy or cloudy first and then its parts settling into a more distinct separation is called sedimentation.