Answer the following question given this paragraph: 

In some countries, birth rates have fallen even lower than death rates. As result, their population growth rates are negative. In other words, the populations are shrinking in size. These populations have top-heavy population pyramids, like the one for Italy shown in Figure below . This is a new stage of the demographic transition, referred to as Stage 5. You might think that a negative growth rate would be a good thing. In fact, it may cause problems. For example, growth-dependent industries decline. Supporting the large aging population is also a burden for the shrinking younger population of workers.


Q: What results when birth rates fall even lower than death rates?

 Choices:

- disease

- mutation

- increased growth rate

- negative growth rate

A:
negative growth rate
