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The situation that is considered reinforcement is Receiving a "thank you" from somebody after doing something nice.
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Manifest destiny was the reason the US claimed Oregon country.
The origin of Sikhism has been the centre of a debate. Others consider Sikhism as a combination of Hinduism and Islam.The founder of Sikhism, Sri Guru Nanak Dev Ji. He rejected most of the beliefs and practices of other Indian religions. Sikhismmight appeal to many Indians in early 1860’s due to rejection of the Caste System and the belief that faith is more important than worship.
New factories in germany put people out of work this is a social reason for migration