Final answer:
Product managers' responsibilities can range from managing a single product to overseeing multiple products or a product line. Their role is dynamic and includes cross-functional leadership and strategic product planning.
Step-by-step explanation:
True: Product managers can indeed be responsible for a variety of tasks ranging from oversight of a single product to managing a product line, or even several unrelated products. The role is extremely dynamic and involves cross-functional leadership across different teams such as engineering, marketing, sales, and customer support. Product managers are key in defining the vision for the product(s), aligning product strategies with business objectives, prioritizing features, overseeing development cycles, and ensuring the product meets the market needs.