Final answer:
The Question Mark quadrant of the BCG matrix corresponds to businesses with a small market share in a rapidly growing industry.
Step-by-step explanation:
In the context of the Boston Consulting Group (BCG) matrix, the quadrant that represents a small fish in a big industry with a low relative market share, yet competes in a high growth industry, is known as the Question Mark quadrant. Companies or products that fall into this category are referred to as question marks because they have the potential to gain market share and become stars, or they may fail to grow and thus become dogs. This category is characterized by high cash consumption to support growth and low cash generation due to their low market share.