What other reasons would England had to fight against the north?

The prime reason for why England fought against the North was the dispute about slavery, with the North being against slavery, and the South being pro-slavery.

Explanation:

The political views of the leaders of the South were much different to those of the leaders of the North. (hope this helps ;)

the answer is mass marketing.

food chain i would say only because there is competition on getting food and survival