Coffee is an example of a a. luxury crop b. subsistence crop c. high-volume crop d. mass-production crop

The answer is A. Coffee is an example of a luxury crop.

Luxury crops are also known as high value crops, or non-traditional crops; they are defined as those crops that have higher market values and generate more profit per acre than traditional cereal crops that form part of the customary diet of the local population.

Coffee, garlic, lavender and gourmet mushrooms are examples of crops that have higher income per unit of resource used for their production.  

the answers is b.   environments.