You are presented with the question "what does a high-mass star collapsing form?" and the following answer choices: 
- forces
 - a sphere
 - a cube
 - a circle
 - dangerous
 - an object
 - comets
 - nucleus

Now knowing that ablack hole is formed by a high-mass star collapses and black holes are considered to be spheres, choose the best answer.


 

  a sphere       