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Gravity made them pull together into proto stars

The Gravitational force pulled together areas of matter in the early universe to begin the process of star formation.

Fundamental Forces

The four fundamental forces that work in the universe are given below.

  • The strong force,
  • The weak force,
  • The electromagnetic force
  • The gravitational force.

These fundamental forces have different strengths and they work over different ranges and directions.

The gravitational force operates on all objects of the universe in the infinite range. Gravitation is the most important of the four fundamental forces for astronomical objects over astronomical distances for two reasons.

To know more about the fundamental forces, follow the link given below.

https://brainly.com/question/910002.