Which of these best explains why the asthenosphere is always in motion? cooling causes expansion and shifting of the fluid particles. cooling causes contraction and shifting of the fluid particles. heat makes the semi-fluid particles sink down and then rise up on cooling. heat makes the semi-fluid particles rise up and then come down on cooling.

Heat makes the semi-fluid particles rise up and then come down on cooling.

Explanation:

 im  taking the testalso what the dude/dudette said its true :)

~ Caroline <3 :)

no it is not. kenya allows smoking weed.

the precambrian aged rocks could be found in australia. australia is a region that has a lot of ancient civilization history from million years ago. in this region, there are a lot of recognizable fossils buried in its land which is considered a precambrian-aged rocks