5. What are the main factors
that affect the growth of a
population?

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
The main factors that populations
grow are births immigration. The
main factors make populations
decrease are and emigration.