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

Fact 2: Habitat Hairy-nosed wombats are terrestrial and build burrows.

Given the two facts above, answer the question "When would animal burrows need replacing?" with the following options: 
- the wearing away of rock
 - when the population is safe
 - when nothing has changed
 - when the animals are happy
 - building housing developments
 - a hemisphere is tilted away from the sun
 - Temperature changing
 - after too much water received


 

     building housing developments    