A push factor is
noun. a negative aspect or condition that motivates one to leave, esp. in one's country, region, organization, religion, etc. In migration, push factors are those that encourage a population to leave its home.
Answer: d
Explanation:
Food to make up for shortages
Answer: The Paleoindian Period refers to a time approximately 12,000 years ago at the end of the last ice age when humans first appeared in the archeological record in North America. One of the original groups to enter what is now Canada and the United States was the Clovis culture.
Explanation:
You are correct on both of your answers.