The first and most obvious answer to the question of why we're so obsessed with burgers is: burgers are cheap. ... It's not just that burgers are cheap, it's that they're easy to eat. Because the meat is ground up, you don't have to do much chewing. Because it's served on a bun, it's easy to eat.
B. Naval Stores that was not a significant part
Answer:
They transported water from mountains to the cities.
Explanation: Water was always important for us humans as our source of minerals and to relieve dehydration. Many people had to work at this because of that reason
B. "hormonal changes in adolescents" is the answer.