Question 1
The correct answer is: "Ethnicity is related to culture; race is related to biological ancestry".
Race is determined by physical features which are inherited by newborns from its biological ancestors (for example, black skin or white skin).
On the other hand, an ethnicity comprises a group of people that share common characteristics such as common language, history, culture, society or national feelings.
Question 2
The correct answer is: "having blonde hair and blue eyes "
It is a feature related to a certain race, and it does not necessarily evidence a cultural distinction too. Two people from different races can share the same cultural background.