Answer: Advanced language
Explanation:
Advanced language is always followed by form and structure and it is the right answer to your question. It is representing the final form of language which means that person had learned every way of communication with that language.
Complete thoughts are not referring to the form and structure and primitive language also. Clear language is having usually short structure.
In the first box : dolphins and grey seals both sleep with half their brain so that the other half can watch for predators
second box : dolphins sleep and swim at the same time ( i think )
third box : ( im sorry but I'm not sure about this one)
i hope this helps a little :)
Answer:
the first excerpt is less important
Explanation: