Why was buddhismespecially attractive to the lower jati and untouchables?

Buddhism taught that anyone could enter Nirvana, no matter how lowly they were on the social scale. Hinduism taught that only the Brahmins, members of the highest caste, could achieve entry into this wonderful state of peace. It is not surprising that the lower castes preferred the teachings of Buddhism. I hope this is helpful

the effect of the ming leaders banning ships with more than two masts was that there was no further construction of ships masts, because there was a surplus. ming emperors disallowed foreign exploration