Answer:
The correct answer is high rates of evaporation
The bug's mass is too low and the train is moving at a higher speed
I think its b model b has more surface area and volume
Stars begin to form from clouds of gas in space. The cold temperatures and high densities (compared to elsewhere in space, but would be considered a vacuum on Earth) of these clouds allow gravity to overcome thermal pressure and start the gravitational collapse that will form a star.
