Question

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A star is born from a (cloud of rock and metal, cloud of gas and dust, heat energy, gravity, increases, decreases, electric forces, fusion)   Slightly more dense regions begin to collapse due to (cloud of rock and metal, cloud of gas and dust, heat energy, gravity, increases, decreases, electric forces, fusion)   In this collapse gravitational potential energy is converted into (cloud of rock and metal, cloud of gas and dust, heat energy, gravity, increases, decreases, electric forces, fusion)   The temperature at the center of the protostar then (cloud of rock and metal, cloud of gas and dust, heat energy, gravity, increases, decreases, electric forces, fusion)  with time. After enough time it gets dense enough and hot enough for (cloud of rock and metal, cloud of gas and dust, heat energy, gravity, increases, decreases, electric forces, fusion)  to start.

Answer 1