Final answer:
Monoculture refers to the practice of growing a single cash crop for profit. It has both advantages and disadvantages.
Step-by-step explanation:
When farmers began to grow a single cash crop to sell for profit, it is called monoculture. Monoculture is the practice of growing the same crop repeatedly on a large scale. This practice has both advantages and disadvantages. On one hand, it allows for specialization and efficient production of the chosen crop. However, it also depletes soil nutrients and makes the farm vulnerable to pests and diseases.