PLEASE HELP!! (I'll give :]) describe these terms:
Rural & urban -
Subsistence farming vs. commercial farming (cash crop farming) -
Plantation -
triangular trade -
Middle Passage -

Rural & urban -  An urban area is the region surrounding a city. ... Rural areas are the opposite of urban areas. Rural areas, often called "the country," have low population density and large amounts of undeveloped land. Usually, the difference between a rural area and an urban area is clear.

Subsistence farming vs. commercial farming (cash crop farming) -Subsistence Agriculture is the production of food primarily for consumption by the farmer's family. Commercial Agriculture is the production of cash crops primarily for sale off the farm

Plantation -  A plantation is a large agricultural property dedicated to planting a few crops on a large scale. A small grove of trees is also called a plantation, but usually when we use the word we mean the big farms. Surely you've heard of southern plantations before the Civil War that raised cotton and tobacco with slave labor.

triangular trade -  Mercantilism led to the emergence of what's been called the “triangular trade”: a system of exchange in which Europe supplied Africa and the Americas with finished goods, the Americas supplied Europe and Africa with raw materials, and Africa supplied the Americas with enslaved laborers.

Middle Passage- the middle passage history the journey across the Atlantic Ocean from the W coast of Africa to the Caribbean: the longest part of the journey of the slave ships sailing to the Caribbean or the Americas.

best i got :)

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering