Answer:
The cognitive skills have not been described by animals is the use of syntax. Answer is option D.
Explanation:
Syntax can be simply described as the rules and regulation for doing any work in a well processed and in a hierarchy manner. Animal does not use syntax for doing any work they do what they like.
The trainer Court is time how to complete a work but the syntax of doing a work or its proper manner how it is done is cannot be taught. This principle is applied not only for wild animals but also for the animals which are kept in home and also for the circus.
