They used sonar to detect german submarines. sonar reflects of underwater sound waves
Answer:
The most important people in my life are my parents because they provide me with food shelter educational facilities and many more e things
They made my life worth living
Explanation:
PLEASE MARK ME BRAINLIEST IF MY ANSWER IS CORRECT PLEASE
The Louisiana Purchase opened up the United States at the time to the Midwest
The answer is this if this is one of your choices <span>Marrying a citizen of a forigen country</span>