Final answer:
Starbucks does not engage in much vertical integration compared to Tesla, Amazon, and Walmart; instead, it sources from local businesses.
Step-by-step explanation:
The company that does NOT engage in much vertical integration and chooses instead to buy and produce from local businesses is d) Starbucks. Unlike companies such as Tesla, Amazon, and Walmart, which control multiple stages of their supply chains, Starbucks focuses more on sourcing products like coffee beans from local farmers and businesses. Vertical integration typically involves a company owning its suppliers, manufacturers, and sometimes even distribution networks, which is less characteristic of Starbucks' business model.