How did Islam spread

Through western africa

Following the conquest of North Africa by Muslim Arabs in the 7th century CE, Islam spread throughout West Africa via merchants, traders, scholars, and missionaries, which is largely through peaceful means whereby African rulers either tolerated the religion or converted to it themselves.

Explanation:

difference: buddhism is a religion while confucianism is more-so a way of life

similar: they don't have human-like depictions of spiritual energies like catholicism, christianity, etc.

similar: they both go to temples.

difference: buddhism was founded in india. confucianism, china.

difference: buddhism aim to achieve enlightenment, while confucianism seeks to achieve structure in society.

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explanation:

. most was thought to be found in the nubian desert, which is part of the sahara desert.