Answer:
Resource conservation
Explanation:
Depresion in term of Resource conservation theory is a mental state where an individual or organism develops motivation to conserve a depleting resources while in search of a new source.
For a depressed organism to reduce energy consumption in order to save for the future, it is exhibiting resource conservation
Bile neutralises the stomach acid.
From top to bottom, I believe the answers are:
Biologist
Chemist
Geologist
Hydrologist
