Fill in the gaps using suitable words. Greetings are the key to (a) ________ strong base of social interactions. They are not just words or (b) ________ rather they are powerful forms of (c) ________ communication. An (d) ________ greeting can cause even a (e) ________ to open up and be comfortable. Among others, there are some key strategies to be mastered to enhance our greeting (f) ________. A smile is a universal language of friendliness and (g) ________. A genuine smile can instantly put people at (h) ________ and create a positive impression on the people (i) ________. It not only makes others (j) ________ welcome but also boosts an individuals' own mood and confidence.