GREETINGS

Pranamam Swami, 1) Please define me the Yama & Niyama. 2) Due to constant chanting of the divine names now am able to concentrate way too than before. Whenever i get time if am not doing any work I would chant hanuman chalisa and now am able to face all problems in my life with a smile believing it to be my karmaphalam. One problem is that sometimes I fall asleep while am meditating. How can I stop this? While sitting in the bus going to office it takes half an hour to reach. During that time I close my eyes and would chant “Om Namah Shivaya”. After this when i open my eyes I see my destination stop only. 3) Whenever I listen an Animal crying it bring tears in my eyes no matter how much I try to deviate my mind. But if i see a human crying am unshakable towards their feeling as if it doen’t concerns me. Can you tell why is that so?