When communication enhances the interaction of learners, it is

Communication is more than mere transferring or transmission of ideas or thoughts. It is not a static act but it is a dynamic process of action and interaction towards the desired goal. Communication is, therefore, a process of sharing or exchange of ideas, information, knowledge, attitude, or feeling among two or more persons through certain signs and symbols. 

Psychological communication enhances the interaction of learners. 

1. Psychological communication involves the communication of mind and behavior.
2. It is not only defined by words but by conscious and unconscious interpretations.
3. Psychological communication is considered to be the most authentic form of communication as it not only helps to interpret explicit meanings but also implicit conversations. 
4. It enhances the interaction of learners as it helps to overcome barriers induced from lack of attention, poor retention, issues of trust, altered perceptions/viewpoints/attitudes/opinions, emotions, closed mind, selective filtering, premature evaluation, etc. 
5. Psychological communication not only helps to enhance the interaction between learners but also contribute to effective learning in learners individualistically. 

Thus, option 2 is the correct answer.