Final answer:
Taking charge of factors causing uncertainty means acquiring direct control over the elements contributing to environmental uncertainty, exemplified by a company investing in renewable energy to reduce dependence on fossil fuels.
Step-by-step explanation:
Acquiring direct control over the source of uncertainty in reducing environmental uncertainty refers to b) Taking charge of factors causing uncertainty. It means actively managing and controlling the elements that contribute to the uncertainty in a given environment, rather than relying on external factors or other entities. This concept relates to business and environmental management, where organizations may adopt either command-and-control regulation or market-oriented tools to exert control over environmental factors that could impact their operations. For example, a company choosing to invest in renewable energy sources is taking direct control over its energy sources, thus reducing the uncertainty related to fluctuating fossil fuel prices and availability.