The answer is: Expert
Expert testimony is a form of testimony that come from people who have deep knowledge and experience in a certain issue. This type of testimony usually regarded very highly in the court and has higher chance to  convince the juries to a certain opinion.
 (examples of expert testimony are: testimony regarding fake internet account from IT experts, testimony about violent behavior from psychologists, etc)
 
        
             
        
        
        
Answer:
<em>Making use of Holophrase</em>
Explanation:
As a child develops, the child learns to speak by making sound and other speech development follows after this stage. A child or toddler makes use of a single word to communicate the idea. In an actual sense, an adult can use one or two sentences to communicate such ideas, but the child does this with one word. 
A perfect case of holophrases is the constant use of "cup" to communicate "I want a cup of milk". In this scenario, the toddler uses the term cup to express a complete idea of having a cup of milk.
The toddler is not lazy, rather the toddler is using holophrases.