I think it’s C. Marshmallow and toothpicks are used to show the composition of a water molecule
apple, earth. earth more massive than moon. astronauts showed this - armstrong etc
The answer is C. nebular are star nurseries. When the massive gas being collapsing in its own weight. Local areas of gas begin to coalesce under gravity. Due to enormous pressure, nuclear fusion begins and a protostar is formed. The protostar grows into the sun as more hydrogen fuses at the core. The planetesimal materials at the edges of the protostellar discs coalesce to form planets that orbit the star.
Some of the benefits are increased heart muscles, increase in blood flow, and reduced body fat
