Between 1450 and 1750 Europeans traded with Africa, but they set up very few colonies. By 1850, only a few colonies existed along African Coastlines, such as Algeria (French), the Cape Colony (Great Britain,) and Angola (Portugal). Instead, free African states continued, and after the end of the slave trade in the early 1800s, a lively exchange took place between Europeans and African states, such as the Sokoto Caliphate in western Africa and Egypt and Ethiopia in northeast Africa. They traded manufactured goods for gold, ivory, palm oil (a substance used in soap, candles, and lubricants .... so pretty much when the Europeans came for these important substances (palm oil) they discovered black people and brought slaves to the Americas ....
The spirit of Western imperialism and Capitalist exploitation of resources. Lead to the best economic choice of Slave Labor.
London
Slave trade was the biggest one. The Portugese also wanted more land and strategic ports for trading.
The Quarkers, James Ramsay, Granville Sharp, Thomas Clarkson and William Wilberforce were humanitarians who contributed to end the abolition of slave trade
slave trade
Commerce and slave trade compromise
Slave families were split up and sold as part of the domestic slave trade.
4 ideas, or themes which led to WW1 are: Imperialism Trade Greed Politics
the slave trade was abolished in 1807.
After the trans-Atlantic slave trade was declared illegal and later eliminated, it was replaced by legitimate trade (non-slave trade).
slaves hence the name Atlantic SLAVE trade
Of those three options, "Limiting American influence in Africa" is the least connected with European Imperialism, but it is worth noting that the others are also minimally connected . The US did not have any serious influence in Africa prior to the mid-1800s and was not attempting to strengthen connections between the US and Africa (especially after the US banned the slave trade in 1807). As a result, the Europeans were not worried about American influence in Africa to the extent that they would want to limit it."Population Overcrowding in Europe" led to an increased desire to settle other places, but it did not lead to imperialism per se. "Expanding the European slave trade" is also not really a reason for European Imperialism since, by the mid-1800s, most European countries had banned slavery, but as late as the early 1800s, a number of European countries were still trying to expand their African slavery networks.