A is a flowing, moving stream of water that feeds into a body of water. hill plain plateau river

River

Explanation:

A river is a flowing, moving stream of water that feeds into a body of water.

C. Energy moves slowly through their layers.

Explanation:

All stars are made of dust and gases. Star is majorly composed of Hydrogen and Helium. Nuclear fusion reaction of Hydrogen atoms powers the stars. All the stars do not have same amount of Hydrogen or Helium.

The energy produced during the nuclear fusion reaction in the core of every star moves slowly through their layers. The energy moves forward in all the directions. Thus, the massive star R136a1 and our star have in common is that the energy moves slowly through the layers.