The answer isn't false, in fact its true.
Answer:
d. abstraction.
Explanation:
Abstraction: In psychology, the term abstraction is defined as one of the thinking processes that tend to reduce a piece of particular information's content related to a specific concept to retain only those information which is considered as relevant for a particular purpose or requirement.
Example: An individual's feelings of happiness and sadness.
In the question above, the given statement signifies the abstraction.
They created the valleys because they pulled them downstream
