Answer:
Great wave of immigration during that period.
Step-by-step explanation:
The colonial population grew rapidly between 1700 and 1770 as a result of the high number of European immigrants. This was also aided by "natural reproduction of colonial families," who tended to have large families with women marrying at younger ages than they do presently.
Immigration is always a factor for population growth. Other factors include reproduction and death rates, living standard, healthcare, and living styles.
Little intermarriages were recorded between the Euro-Americans (colonial settlers) and the Native Americans. There was so much resistance from the Native Americans to intermarriages and cultural changes, as they were hellbent on maintaining their separate identities from the settlers. So, this could not have been a factor for the rapid population explosion witnessed during the period.
Lastly, there is no documented evidence of a program of forced migration instituted by the monarchy. Migrants from Europe freely travelled to the newfoundland to settle.