Which of these is/are reasons that you might see a very broad range for your melting point?.

It is widely known that laughter helps to reduce stress, reduce pain and improve life quality.

Explanation:

Laughter increases well being while reduces stress. A systematic review on five laughter interventions and one humor intervention on older adults showed they can improve well being, though there is more evidence needed (Gonot-Schoupinsky, FN & Garip, G, 2018).

Moreover, laughter and humour interventions have great impact on personal development and self care. A systematic review presented outcomes to believe that these interventions may have better results when they are tailored on specific needs and objectives (Gonot-Schoupinsky, FN, Garip, G Sheffield, D, 2020)

There is also a training called Laughter Yoga which is made of different techniques and excercises. A study showed a positive effect on motor functional and flexibility in people with Parkinson (Akram, K, Nader, R & Ahmad, C, 2013) However, there is a need to keep on studying Laughter Yoga interventions (Bressington, D et al, 2018)