Answer:
byproduct
Explanation:
A byproduct is a secondary product derived from a production process, manufacturing process or chemical reaction; it is not the primary product or service being produced.
Answer:
A
Explanation:
Prince Henry the Navigator created a school for navigators and an astronomical observatory at Sagres, Portugal in 1419. People received education on nagivation and map making in this school, training to navigate to the west of Africa later on.
Answer: Bering Strait Land Bridge
Explanation: they walked across on the exposed land between Russia & Alaska
