What did europeans do as they established colonies in the africas?

During this time, many European countries expanded their empires by aggressively establishing colonies in Africa so that they could exploit and export Africa's resources. Raw materials like rubber, timber, diamonds, and gold were found in Africa. Europeans also wanted to protect trade routes.

These islands/chinampas then provided rich soil for crops with easy access to water. i hope this is correct, im so sorry if its not !

I'm pretty sure that's called a volcano