I'm doing a project and i need to know what this means: what is your colony's economic activity to repay the joint stock holders/ make a profit? what does this mean?

just finished this it is b. centrifugal force

the  seven  days  battles  were  a series of seven battles over seven  days from june 25 to july 1, 1862, near richmond, virginia,  during  the american civil war. the  seven  days ended with mcclellan's army in relative safety next to the james river, having suffered almost 16,000 casualtiesduring  the retreat.