Final answer:
The correct answer is c) Market segment, which represents a group of customers with purchasing power and unsatisfied needs.
Step-by-step explanation:
A market segment is defined as a group of customers or potential customers who have purchasing power and unsatisfied needs. Therefore, the correct answer is c) Market segment.
Understanding the concept of market segments is crucial for businesses as it helps them target their products and services more effectively. By identifying groups of consumers who share similar needs and characteristics, companies can tailor their marketing strategies to specifically address those needs, potentially increasing their market share and customer satisfaction.