The answer is b because the other ones are involved in environmental science
Political instability would be your answer
The main U.S. goal in the Southeast Asia War was to protect South Vietnam -- initially from a local communist insurgency and later from conquest by communist North Vietnam. The U.S. also hoped to prevent the spread of communism to other nearby countries. ... The U.S. gave France military assistance in fighting insurgents
Answer:
False
Explanation:
Movement in geography is about literal, physical movement, like transportation and such.
For lumber it is where it is rainy but not flooding in rain because if it is flooded in rain it will have rotten layers inside making it bad to use and will not be safe to use.