Step 1: Comprehension of the Inquiry.
Paras exhibits negativity due to dissatisfaction with his performance review. The inquiry seeks a resolution to alter his disposition.
Step 2: Examination of Alternatives.
- Relocation: A transfer may involve a change in role or department but might not directly rectify the core attitudinal issue.
- Absence: Taking leave could offer respite but does not resolve the fundamental cause of the negative sentiment.
- Encouragement: Motivation represents the most appropriate resolution, as it entails enhancing Paras' outlook and fostering improved productivity.
- Synchronization: Synchronization enhances collaborative efforts but does not directly address an individual's attitudinal deficiency.
Step 3: Determination.
The appropriate selection is Motivation, as it can assist Paras in overcoming his negative disposition and enhancing his productivity.
Concluding Statement: \[\boxed{\text{The correct answer is (3) Motivation.}}\]