So, this carbon, is our sp2 hybridized carbon now, and you can see it's planar around that carbon. And, this is a tertiary carbocation. We have a methyl group here, a methyl group here, and then an alkyl group over here. So, a tertiary carbocation is more stable than a secondary. You can also see at this carbon now we have an sp3 hybridized carbon here, so the geometry around that carbon is tetrahedral. It went from being planar to tetrahedral geometry.
Cross merchandising refers to the display of opposite and unrelated products together to earn additional revenues for the store. Products from different categories are kept together at one place for the customers to find a relation among them and pick up all. Unrelated products are displayed together.
It depends on companies/industries but I'll try to answer based on my own understanding/experience. - sourcing = search for new sources of supply, place the orders and that's it. - merchandising = it's a term in retail industry, you find products that make good sales (you're in charge of overall profitability of your own product category). In fashion/cosmetics industry, you also have to monitor trends, develop new product ideas and manage product launch. - purchasing/buyer = kind of clerical job, deal with regular suppliers, negotiate, raise the orders.