Answer:
of, relating to, being, or involving conscious intellectual activity (such as thinking, reasoning, or remembering)
It means thinking and reasoning and remembering . Here is the word in a example sentence .
Frequency: The definition of cognition is the mental process of thinking and understanding and the understanding that comes from this mental process
An example of cognition is the thought process you undergo when you learn how to do a new math problem for the first time.
The answer would be D. Vebral irony is when words express something contrary to truth or someone says opposite of what they really feel or mean
I believe it is c hope i helped