Fact 1: Ablack hole is formed by a high-mass star collapses.

Fact 2: Collapsed stars are dead stars.

Given the two facts above, answer the question "what high-mass object forms black holes?" with the following options: 
- layers of fat
 - an object
 - dead stars
 - moons
 - graptolites
 - shooting stars
 - milky way
 - It expands


 

   dead stars      