Fact 1: Building housing developments usually requires replacing animal habitats.

Fact 2: Habitat destruction is the primary cause of extinction or threat of extinction for all animals.

Given the two facts above, answer the question "Building housing developments may cause " with the following options: 
- eruptions
 - colder weather
 - disease
 - erosion
 - extinction
 - mutations
 - Destroy bridges
 - deforestation


 

     extinction    