Answer:
The "dark matter" is responsible for giving a "galaxy its particular shape".
Step-by-step explanation:
- In a galaxy, it is mainly the dark matter that holds the galaxy together. A galaxy that is in motion exerts centrifugal force on the planets, stars and other material.
- This force tends the planets and stars to move away from the "center of the galaxy".
- On the other hand, the dark matter deploys gravitational force on the material present in the galaxy which holds it in its place.