B abstraction is youre answer
1. He still remains the youngest person to become president of the United States.
2. He won the Nobel Prize for Peace in 1906.
3. He dramatically expanded the system of national parks and national forests.
4. He also facilitated the construction of the Panama Canal.
5. And finally, Theodore Rosevelt received a Congressional Medal of Honor in 2001 due to his acts of bravery on the field while serving in the U.S. Army.
A.Many people who like to go hiking have spent a weekend roaming Yellowstone Park
Answer:
because they helped strengthen their industrial-based economy.
Explanation: