colonial governments benefited from slaves due to the fact that slaves were free labor. they could have slaves work for no pay as long and as hard as they want. meaning industries like cotton mills became wealthy. due to the cruel labor of slaves. meaning it was like an economic boom in money. also the slave trade were the government could make money from the trading of slaves. and one last big thing would be the use of slaves to serve in the armed forces for there freedom. hope it help if you put in the answer choices i could help you find the best one if needed.
