The answer for this is C.
Physics: yes! it means "knowledge of nature" in Greek!
biology: yes! bios- means "life" and and logy: study
geography: yes! geo is earth and graphy:
Algebra: no! it's an arabic word.
philo-(love) sophy (knowledge) is also of greek origin!
Answer: D
Explanation: The Latin root press means to squeeze, push, or weigh down. The meaning of the Latin prefix isn't really needed here. The root almost gives you the answer by using bush and down in the same sentence.
The Great Depression happened in the 1920's and 1930's due to many economic disasters such as the Market Crash in 1929 and bad mistakes by the President (Hoover)