Why did the slavery issue become linked with Manifest Destiny and western expansion?
A Admitting new states could upset the balance in Congress between free states and slave states.
B Most people in the western territories thought that slavery was morally wrong and refused to allow it.
C Enslaved people who escaped often fled to the West, where they were protected by territorial laws.
D Southern leaders worried that most new states would be free states because the climate and terrain in the West was not suited for plantation agriculture

here is a link that will you.

written by alan ward and published in 2003. ward is a historian and was a professor at the university of connecticut.

if this isn't what you are looking i would like to know more details.

the nets, boats and fishing poles are examples of determinants for catching fish. if a fisherman has a quality fishing net and fishing poles plus a high end fishing boat, then there is a big opportunity or possibility that he may catch more fish.

moreover, fish production is directly proportional to its determinants such as boat, net, fishing poles and bait. therefore, a good equipment is a determinant while fisherman’s effort is an input to his fishing skills and the output is the production made out of catching fish.