Final answer:
Azure Cost Management and Billing is the correct tool for calculating cost savings due to reduced electricity consumption by migrating resources to Azure. This service helps monitor spending, optimize resources, and improve overall energy efficiency.
Step-by-step explanation:
To calculate cost savings due to reduced electricity consumption as a result of migrating resources to Azure, the correct tool is a) Azure Cost Management and Billing. This service provides the necessary financial management capabilities that help in monitoring and controlling Azure spending and in optimizing resource use. With it, you can analyze costs, create and manage budgets, and export data for further analysis. It is more specifically designed to handle cost-related inquiries over other Azure services like Azure Log Analytics, Azure Advisor, and Azure Monitor.
In general, to achieve cost savings and energy efficiency, it is essential to reduce the use of high-power devices that operate for prolonged periods. However, efficiency can also be increased by using more effective devices like compact fluorescent light bulbs, which provide more light per watt compared to incandescent bulbs, thereby contributing to energy savings.