A free root can stand alone with nothing added to it.
Given that it is 'free,' it can exist alone and doesn't have to have either prefixes or suffixes added to it in order to exist as a word. A root is the smallest part of a word (when you take off prefixes and suffixes) that still has a meaning.
For example: unbelievable - here, the root is believe, the prefix is un- and the suffix is -able.
Answer:
B) respondent behavior.
Explanation:
According to my research on studies conducted by various behaviorists, I can say that based on the information provided within the question they are said to be involved with Respondant Behavior. This is a behavioral process in which you react to a certain stimuli, and is essential to the organism's survival.
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