Why did the first americans migrate to north america?

a) they were trying to find a warmer climate.

b) they were following their food source

c) their gods told them to migrate.

d) their homes were destroyed by a flood

Ablank relationship exists between an employee and a supervisor

Whether or not a given study has the possibility of causing harm to participants:

Which of the following discoveries would be most likely to cause a scientific paradigm shift? a. the discovery of more rings around uranus b. the discovery of a new pathogenic virus transmitted by mosquitoes c. the discovery that a dormant volcano is showing signs of activity d. the discovery of a new species of salamander in the amazon rainforest e. the discovery that excess heat is radiating from the center of the earth and causing global climate change