They feel that we should be fully aware of our own environment.

Answer: Option D

nationality : the status of belonging to a particular nation.
heredity : the passing on of physical or mental characteristics genetically from one generation to another.
nature : the phenomena of the physical world collectively, including plants, animals, the landscape, and other features and products of the earth, as opposed to humans or human creations.
surroundings : the things and conditions around a person or thing.
environment : the surroundings or conditions in which a person, animal, or plant lives or operates.


Synonym of environment is surroundings