This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Ang dahilan ng pandarayuhan ay nakadarag ito sa isang populasyon at maaari rin itong panlabas na pandarayuhan kapag panlabas na pandarayuhan ito ay nakababawas ng populason.
Dalawang uri ng pandarayuhan:
panlabas na pandarayuhan-nakababawas.-immigration.
panloob na pandarayuhan-nakadaragdag.-emmigration.
Hope it helps.:D.

2 5 2
Ang dahilan ng pandarayuhan ay nag papalaki ito ng populasyon at nag papaliit rin ito ng populasyon.
1 5 1